The cache is not located at the posted coordinates.
@6^8%6@8&6$
@6*8#8%6@8^#!
After decoding the two lines above, you will also need to know the proper order of precedence for arithmetic operators.
I thought about giving a hint for the approach direction; but decided instead to just bump the diff up a half, and let you work for it... 
I WILL give you the container, though, which is a large medicine bottle in full camo. Please replace as found, with a little natural camo added. REPLACEMENT CONTAINER IS A MICRO, AT A HIGH ELEVATION. And I'll also give you a checker, which you can access here.
Original contents are a few trinkets for trading, and for FTF four Kennedy half-dollars. Enjoy!
Congrats to SGF for FTF!
Hint? What hint? I don't see a hint!
Guess everyone else is getting ready to party tonight...