I'm headed to Seattle in three weeks, for 4 nights/5 days. We have never been before and want to see Seattle, Olympic National, Victoria, Mount Rainer/St. Helens and Snoqualmie. Is it possible?

You definitely cannot see all that in 5 days. Narrow down the list to 2 or 3 places as that will still be rushing, but at least you can see a bit of the different areas.

What would you recommend? It is our anniversary, so some romantic spots would be nice. I guess Seattle and Victoria are to two Big things. But I'd like to see at least one of the national parks.

They are all great places, so it just depends on your interest and how much driving you want to do. Victoria is a long day because of the ferry. For a trip this short, I would skip it and do it another time. Mt. St. Helens is amazing, but again it would be a full day. The visitors centers will still be open when you come, so if you decide to do this be sure to stop at them. The "must see" one is Johnston Ridge.

What do you want to do at Mt. Rainier? Are you thinking of just going there and poking around or really doing some hiking? If you are not wanting to hike, then I would skip it.

The Olympics are fantastic. It will take a full day, but there is so much to stop and see along the way that you are not wasting driving time.

And of course downtown Seattle has a lot to offer itself.

Seattle and Snoqualmie are close together, but everything else you mention is a fairly major undertaking requiring at least two days (counting travel time) for each place.

You can easily do Olympic National Forest in less than a full day if you do not plan to hike much or at all. We drove around, stopped at the visitor's center, stopped along the way to take pictures, took a couple of brief walks, and were back in Seattle before dark. Even if you can only see a fraction of the area, it's gorgeous up there, I wouldn't miss it. Snoqualmie was a much shorter trip from Seattle, be sure to make a reservation for a meal at the Lodge. have fun!

If Victoria is a Big Thing for you, you could combine that with Olympic National Park; the trip would take 2 of your 4 nights. Drive to Port Angeles (departing in the morning) and leave the car there in one of the lots provided for overnight parking. You can easily catch the 2:00 pm sailing* of the Coho as a walk-on passenger. Spend the night in Victoria, return the next day to Port Angeles, pick up your car and see what you wish of ONP (rainforest and/or Hurricane Ridge). Spend that night in PA or one of the area lodges like Lake Quinault or Lake Crescent (sorry, I don't have personal recommendations here). Then return the following morning to Seattle.

* Check the schedule carefully; on Oct. 5-8 there is no 2:00 sailing but instead a 12:45 and a 5:15 pm, so you'd have to adjust your schedule according if you are going on one of these days.

You can easily visit Snoqualmie Falls in a half-day from Seattle. jOr less, if you go to the lodge for breakfast, which is what many people like to do.

Mt. Rainier would take a full day from Seattle if you spend any time at all hiking---highly recommended in late September when the foliage has turned red. But if you just with to see the Mountain, you can do that from Seattle (on clear days).

Ok, I think we'll head to Port Angeles from the airport & stay there. Then take the ferry to Victoria the next morning and stay one night. Then take ferry back to see Olympic then drive to Seattle fot the next two nights. I do have a few more questions, if someone can help please.
If I wanted to leave the car in Port Angeles, how do I go about getting my luggage on the ferry to Victoria? Do they check it? Would I be better taking the car over?
Also, if I want to see the ocean side of Olympic where do I enter the park (is there more than one way in)?
Last, any suggestions on best routes or "must see's" along the way.
Thank you.

You would carry your luggage onto the ferry. If you have roller bags that would make it easiest.

Taking the car on the ferry would mean additional cost and a possible long wait, unless you make reservations.

To see the "ocean side" of ONP, you'd drive out to Forks from Port Angeles (about a 90 minute to 2 hour drive) and drive west from Forks to Rialto Beach and/or the beaches near La Push (2nd Beach is my favorite there). While you're out there, if you have time, I'd highly recommend seeing the Hoh rainforest as well (the entrance is about 10-15 miles south of Forks, and then you drive about 20 miles into the park--it takes about an hour each way from Forks to get to the visitors center, where there are a couple of nice short trails that will give you a sense of the rainforest).

Thre is no need to take your car on the ferry to victoria. The Coho docks right in the heart of downtown Victoria, in front of the Empress Hotel and within walking distance to many others. If you don't have roller bags, leave most of your things locked in the car and pack what you need for one night into something you can carry on board. There are parking lots very close to the ferry terminal in Port Angeles (unless things have changed since I was last there).

Thanks for all your help. Looks like leaving the car will save us about $100, so that's great.
Does anyone know the best route from Seatac to Port Angeles (around 11:30-12ish on Sun.)
On our way back to Seattle thought about seeing Bainbridge or Whidbey (maybe staying a night) any thoughts? If we did stay on Whidbey what is the ferry wait to get to Seattle late morning on weekday??
Thanks.

There have been quite a few posts/threads this summer about how to get from Seattle/Seatac to Port Angeles so you may want to do a search on that. But basically, you can drive around (go south on I-5 to Rt. 16 over the Tacoma Narrows Bridge and north on Rt 3 through Bremerton) or you can drive into Seattle and take the ferry to Bainbridge and drive from there. Driving around will be a bit faster but the ferry is more relaxing/scenic IMO (but you'll have other opportunities to take ferries, it sounds like).

As for getting from Whidbey back to the mainland, you shouldn't have to wait long at all mid-day during the week. The ferry runs every hour.