A: Go to N45°11.161' W88°24.050' and get the number of the building to the south. Subtract 1 to get this digit.
These coordinates take you to the Adventure section of camp.
OK. That's enough help for now.
(Scroll down for more clues.)
The building is "Warehouse 2". When you subtract 1, you get 2 - 1 = 1, so the letter A should be replaced with the digit 1: N45°11.1BC' W88°23.DEF'
OK. That's enough help for now.