My DW and I spent our 30th anniversary at the Meadow Lake Resort near Columbia Falls. We had a condo with a hot tub which was very nice. It wasn't too much over $100/night. We arrived in Whitefish on the Empire Builder and the Meadow Lake driver met us and another couple with their van.
We called and had a rental car delivered from the Kalispell airport. We were allowed to leave the rental car at the Whitefish Amtrak lot when we left.

Here's an option between East and West Glacier on Hwy 2. The rooms have fridge and microwave and are $149 during peak season. When are you going?
http://www.glacierhaveninn.com/

We will most likely go in peak season - July or August. I know that will be the busiest time, but it fits our schedule. There will be my DH and me.

Have you tried looking at Swiftcurrent Motor Inn in Many Glacier or Rising Sun on GTTS on the east side. There may be availability for you dates.

Somewhat more than $100 per night but not outragious. Just over-priced.

And convenient depending on you plans.

We stayed at the Mountain Pine Motel in East Glacier.

As plain and simple as could be, probably unchanged from the early 1960's. Clean as a whistle, comfortable beds, and the horse drive back to the stables came right down the adjacent street. An easy walk to lots of places to eat. Still less than $100 and great ratings on all the usual places.

kwood, if you go in July/August the GTTS road will be open. But if it weren't, you'd have to drive on Hwy 2 to get to East and West Glacier. I liked staying in Essex because it's in-between the two entrances of the park. Even with GTTS open, a day's excursion would be a complete loop. Glacier Haaven is not fancy at all and is a family run motel/cabin/campground complex. But they serve a good breakfast and the nice husband/wife team really know Glacier. He worked in the park for years. They gave us wonderful sight-seeing tips at breakfast (even though I had already researched a lot), offered to make our boat reservations for us (and we didn't have to wait inside the park) and we even rented bear spray from them.

I liked the location because every night we stopped at the Goat Lick overlook and watched the baby goats and got lots of great pictures. We usually ate our main meal in the park and then brought something home for dinner from the East Glacier Trading Company - example, a freshly made pizza and slices of pie for dessert from the diner. Our host recommended the restaurant at the Isaac Walton inn - and that's another option of a place to stay in-between the entrances. I loved the feeling of being out in the forest instead of in a town/city. Anyway, look at options at Essex. It's more of a community than a town. We stayed at a privately owned cabin.

There is also of course Kalispell, Montana which is 32 miles from the west entrance, about 35 minutes away, with all sorts of restaurants, shopping and hotel space.

If you're there to hike, you'll want to spend your most time in the Many Glacier/St. Mary area (east side) of the park. The east side of the park is the most scenic and will have the most popular hikes like Grinnell Glacier and Iceberg Lake.

My husband and I also like the Two Medicine area - not as crowded and also some excellent hikes like Scenic Point, Dawson Pass and Pitamakan Pass.

http://www.hikinginglacier.com/glacier-top-ten-hikes.htm

We always stay at Jacobson's in East Glacier Park. They have small cottages, nothing fancy but clean and family operated for many years. They also have at least one or two with a full kitchen. When we want to do hikes in Many Glacier, we just make the hour drive up there.

It's already late in the season to be booking your accommodations, especially the lodges in the park. Another option would be to find arental through vrbo.com.

Don't overlook the Highline Trail, Avalanche Lake and Sperry Chalet on the west side.

John, you are correct, the HIghline is a must! It might be tough getting reservations at the Sperry Chalet as they fill up quickly. We've hike up and back in the same day, it's a tough 12 miles, but they do serve a great lunch of homemade soups, breads, sandwiches and desserts.

Wow! Thanks, everybody. Terrific info!