Glacier is probably my favorite NP. Went there a few years ago with a friend from Germany, it was amazing. Did a long road trip and passed through Spokane and N Idaho. Camped in a small campground just east of Saint Regis in Montana. You could probably make it all the way in one day from Spokane.
If you can spend more than a day there. Unless you get a backcountry permit you will be camping in the main campgrounds. I stayed at Sprague Creek and Many Glacier. Both were full so be sure you arrive around 10 am when people are leaving so you can snag a spot. All food/ coolers need to be locked in your truck or secured in on-site bear proof food lockers. Think there might be a shower at St. Mary.
Get out and hike. 99% of people drive around and never leave the road.
My most memorable hike was a big loop on the east side of the park. At the trailhead we ran into a young photographer who was smoking and telling us about all the dangers in the park. Then he warned us not to hike since we would be eaten by bears and never return...he took our picture in case he was the last one to see us alive.
The hike took us around a lake (can't remember which one), but it was eerie... Not a single person on the trail. It was flooded too, some parts of the trail were under water and some creeks were tough to get over (raging water, jumping from half submerged rock to rock).
On the way back we were in shrubland, thick bushes on all sides. About 30 feet in front of me I watched the bushes shake and a huge grizzly came up on the trail. It turned and looked at us. I have never in my life felt such a rush and flooding of all my senses, it was an ancient primal feeling. It would have been an awesome picture, but in the moment my thoughts were on self preservation. The bear looked at us for about 15 seconds (felt like forever!!) and left us along and went on its way along the hiking trail (same direction we were going). We waited there about 15 minutes and another bear came up on the trail at the same spot! It looked at us too and went along the hiker trail in the same direction. It was starting to get dark and we debated going all the way back the way we came or finishing the hike (it was a giant loop, we were 90% done, would take hours to go back). If we went ahead we would be in thick shrubland and wouldn't be able to see the bears if they were close. We waited another 30 minutes and decided to go ahead. A few minutes later we did run into both bears, they were on our right near the trail and were watching us.
This is when we ran into the bears the second time. The German took a quick picture. They were farther away and the zoom is kind of blurry, plus he was shaking with adrenaline. You can see the first bear in the middle of the picture. The second one is hard to see- it is directly to the left, behind the three trees, you can see a brown outline against the rock-
It happened so quick but I all remember was hearing a loud crack and the lead bear was running at us, we took off and ran as fast as we could. It never caught up to us, but in the short bursts the bears run they sound like thunder.
More park pics-
It is an amazing place, don't miss out!
Edited to finish my story and add pics