Hotel
This is where we're doing everything. Room and board is included with the cost of RSVPing yes. Stay here.
Flight
Great Falls is the closest airport to the Camp. Great Falls is fine.
Flight
Bozeman is also an option. Its about three hours from the venue. It is between the camp and Yellowstone National Park if you want to make that part of your trip. Definitely book your car rental in advance. It is a Southwest terminal for you weirdos (looking at you, Lee).
Travel Note
About 3 hours from the Camp. If you haven't been, you should go to the sun on your trip west (don't worry, there is a road there).
Travel Note
About 4-hours to the closest entrance, and 5- to 6-hours to Old Faithful (depending on the number of Bison you pass). Just... stay on the board walks in the geyser basins... and don't touch the bison.