To get the final location of this bonus cache, you must complete the Adventure Lab. The final is close by, no need to drive to it.
Solve the following for the final:
N38 42.abc W077 13.ade
This is a very high muggle area, and many locals as well as snowbirds frequent this establishment. So please be stealthy in your search. Also bring a writing utensil, there isn’t one in the hide, and please DO NOT leave any travel bug, there is no room.
Snowbirds like to take is easy, and this bonus is as easy as it gets.