Took a 17 day trip to Glacier this August from KY. Went out I 94 and came back I 90. Spent 7 nights in Montana with 3 nights in Many Glacier CG on the east side of the park.Great location if you like to hike. Reservations need to be made 6 months in advance. Sites in the park go as soon as they are available. It took me 4 days to get a site. Highly recommend the Red Bus tour from one side to the other. The last day we parked the MH at the east visitor center and road the the free shuttle thru the park. Not much in the way of to stay, eat or do on the east side. A lot more options on the west side. Things to see on I94 are Theodore Roosevelt NP, Enchanted Highway in ND, and Jamestown ND. On I 90 are the Black Hills , Crazy Horse Monument, Mt Rushmore, the Badlands and Wall Drugs. Yellowstone is only a few hours south of I90. If going from Browning to ST Marys on the east side, MT 464 is a much better road than US 89