Did you know the first true Wally World opened on July 2, 1962?
You seek a black bison in a tree in the Wally World parking lot. This cache is the definition of a P&G. Parking everywhere. Ha! Stealth is required due to this being a high trafficked area. The difficult part is the tree itself. You cannot see the bison. You need blind trust to feel the bison. Or a ladder, which would really stand out in a Wally World parking lot.
Good luck and happy hunting!