I went there in the 1970s with my parents and loved the place. We were going to try to make it this year and did not, but it is on my bucket list.
If you are tenting, you will have many more options, and if you like to hike into the backcountry, you are in for an incredible experience.
Have you seen the comparisons of glacier retreat in historic photos to current ones? There is a display on-line at the official website and it is amazing to see.
The Going to the Sun Road was an incredible drive and I was lucky to be a passenger. Can't imagine that the driver gets to see too much of the scenery. I can still recall the vivid scenery, the waterfalls, the lakes, the animals, just fantastic.