"Jeff gets lost trying to find his way back to wherever they parked the car, miles and miles away, falls down a steep incline, and is killed."
Double LOL :)
When I was writing my previous post, I was thinking, "They manage to find where Brigadoon was in the middle of the night? I never thought about this before." Since they don't seem to be carrying suitcases (or at least the script doesn't they are), you're probably right that they did check in somewhere. :) Or they left them in the car they parked . . . somewhere.