A nice quick puzzle hopefully. Just fill in the arrows and circles with the appropriate numbers below the grid to make the diagram flow, and use the formula at the bottom to get co-ordinates for the final cache.
So, N51 (C-A)(J/H).DGC
W003 (A-D-E)(C-B-E).(B-F)F(H-D)
Cache is in a spot that is close to a road so you will need to be careful of traffic, but I just liked it!
Puzzle rating 2, cache rating 2.
You can validate your puzzle solution with certitude.
Angher nyjnlf jvaf. Gbc evtug vafvqr, urnq urvtug.