I'm Puzzled Mr. Rebus Mystery Cache

Cache is not at the posted coordinates but there is lots of room to pull off and park at the cache location.

The letters in the lower right corners of each puzzle block are to be used only for solving the coordinates, not the individual blocks.

Final Coordinates:

N(C-G)(G+B+D) (B-D)(K-G).(F+B)(J-F-B)(A-E+K) W(F-G-B)(D+B+G)(C-K) (J-E)(A-H+D).(F+K-A)(B+C-H+G)(J-D)

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