We will be travelling from Juneau to Prince Rupert by ferry over a period of twelve days, stopping at Juneau, Sitka, Petersburg, Ketchikan and Prince Rupert; the taking the Skeena to Jasper.
Missing the section Prince Rupert to Port Hardy. Is that a concern, or will we have seen sufficient of this very special place?

I drove to Prince Rupert and took the ferry to Port Hardy last July.

I enjoyed the first 5 hours of it.
Then, I had seen it enough. We had a cabin and snoozed a while. Fortunately, the food was good even if my wife thought the singer in the restaurant was in mortal agony. Luckily, he subsided shortly after we got there. Unfortunately he was a fast healer and resumed as we were leaving.

I don't think you will miss much if you get off at Prince Rupert, considering you will have seen more spectacular landscapes in getting there.

Get on to Jasper. More and different sights await.

There is a charge for my advice.
As you approach the Rockies, you will leave "foreign soil" and cross onto the North American tectonic plate. The rest of BC joins on to the North American plate with a notable feature known as the Rocky Mountain Trench, one of the great fault lines on the planet. Read up on it so you will not cross it in ignorance.

totally agree with bob.
i also did p.r. to port hardy and someday hope to do from rupert NORTH, but have no desire to re-do the mentioned route.

stopping at the roadless "wilderness ports" to watch the kayaks disembark, and the 4x4's pick up fishermen, etc. was very interesting. but i do assume you will have seen the most spectacular scenery before your arrival and agree that get onto the parks, as the wildlife is like nothing we have seen.

the elk were "grazing" in a gas station, licking the diesel fuel off the cement .
too funny.

then a ranger had to come scare off some mountain goats perched on a cliff ledge causing a traffic jam practically in town.

we also had a young wolf /coyote on side of road in august snow flurries practically jump into the car when we rolled down window to take picture.

the tourist office at jaspar is beautiful. flowers everywhere. would go back to that area anytime.

thanks for the advice and suggestions. They have confirmed what I thought. Perhaps now some advice on what is best in the Jasper/LL/Banff areas.
We will be hiring a car. Wish to just appreciate the scenery, stay in B&B style accommodations and have ten (10) days in the area.
Would it be better to stay in one place and traverl out/ or to stay a few nights in each locality?

the .bc. and alberta tourist offices send out a great b+b/accomodations booklet, etc. to help plan your trip.
we used accmodations through that plus conventional hotels with free reservation numbers and had no problems.

The best part is the Icefields Parkway!
And all the gorgeous views.
Around Jasper, Mount Edith Cavell and the Angel Glacier win my vote.

In the lake Louise area, the lake itself and Moraine Lake are gorgeous.
Around Banff, I like the sign that says Sortie as I am leaving.

Over Kicking Horse Pass on the Trans Canada, I like Takkakaw Falls. I doubt if thereis a more spectacular alpine fall anywhere in Canada.
(Chutes Montmorency is spectacular too, but that is a whole river flowing over a cliff.)