Yeah that does make it a little more creepy. Those guys were douchebags for sure, and Mike did admit to getting rid of the map which doesn't make sense given how "scared" he was and bitching about being lost.
I didn't really get the ending so it could explain that too. The one thing though that his theory doesn't explain is all the noise they heard at night when all 3 of them were together. That Travolta part was hilarious lol.