THe cache is not at posted coordinates. This is a simple two stage multi using the Arnold Cipher.
N 43° AB.CDE' W 85° FG.HIJ'
A = 527
B = 527
C = 527
D = 225
E = 425
F= 615
G = 411
H = 726
I = 527
J = 421
Check sum: North=19 West=26

Fvta - Neabyq pvcure, gura pbaireg yrggref gb ahzoref - N=1, O=2, P=3...B=0
Svany: Zntargvp ba cbfg.