Based upon my recent trip to Glacier National Park and Yellowstone with several stopping points in between, here are a few tips:
1) Sunscreen and hats! Montana truly is Big Sky country, and there isn't a lot of shade. Yellowstone is a lot more lush, but you'll probably spend a lot of time visiting the hot springs and geysers, and well, leafy trees just don't survive too abundantly amongst all that steam.
2) Cell phone coverage: don't expect your cell phone to work in either park. In fact, at Yellowstone, the tour guide said, they've cut cell phone towers by about 15 feet recently. The one place mine did work was in the Old Faithful area.
3) Food: At the very least, bring your own snacks and drinks. Consider buying a styrofoam cooler at the beginning of your trip; it will pay for itself! If you're going to Glacier National Park and arriving from Kalispell, stop by the Super One grocery store in Columbia Falls, about 4 miles from the airport and on your way to the park. Stock up! Otherwise, you can expect to pay $7.00 for a box of cereal inside the park.
4) Mornings are chilly; afternoons are scorchers! And, as mentioned earlier, it's full sun. Thankfully, though, there's no humidity.
5) The Yellow Bus tours at Yellowstone are well worth it. They basically depart from any of the five lodges. Once you know where you're staying, go ahead and reserve a spot. THe vintage busses only hold about 12 people, and they fill up fast. Here's a good url: http://www.travelyellowstone.com/summer-tours-activities-256.html. We took the Geyser tour and one of the wild life tours.
6) The Red Bus tours in Glacier are also well worth it. The tour guides are very informative... and, do you really want to drive the Going to the Sun Road yourself and miss the spectacular views?
7) If you're driving I-90 and passing through Whitehall, stop at the Two Bit Saloon, right on the corner when you hit the main drag. The bartender is the friendliest fellow. He gave us ideas on what to do and see the rest of our trip. We ended up taking the "old road" back to the interstate, which ran right past Lewis and Clark Caverns State Park. We would have missed that beautiful park otherwise!
8) If you're coming into Yellowstone from the north entrance and want a picture of the Roosevelt Arch, it's better in the afternoon, based on the direction of the sun.
9) If you're driving through Reno MT (It's a little south of Flathead Lake.) and want a good place to eat, try the Reno Cafe. It's good food, run by Amish people, and there are a lot of inspirational sayings hanging on the walls.
10) If you go to Little Bighorn, take the $8.00 tour run by the local college. It gives a good intro to the battle. Then, after the tour, you can explore the parts you like on your own. And, another good feature that is free is the 45-minute talk given by the Park Rangers about every hour. They really give the battle and the events leading up to it a lot of personality.
