[jsmith948]

We are currently planning a trip through western Washington, then over through Spokane to Glacier and then down to Yellowstone and Grand Tetons.
There are several campgrounds in the West Glacier area. All are a little pricey.
We were able to find an opening at the Glacier Campground in West Glacier and found openings at the Fireside Resort at Buffalo Valley in Moran, WY. for the Tetons.
These parks were full or filling up fast when we made our reservations a week ago for the end of July. So, it depends on when you plan on going.
As for Yellowstone, we have stayed at the Grizzly RV Park in West Yellowstone (right outside the west entrance). Again, a bit pricey, but a really nice park with great staff and walking distance to Buffalo burgers.