This is a 2-stage multi with a pull out for parking near both stages.
Gather information at Stage 1 to get the coordinates for the final. Be prepared (See cache name) at the final or you will walk away empty handed. 
The final coordinates are:
N 38 AB.CDE
W 121 FG.HIJ
At Stage 1 there will be a sign with four numbers on the lower left and the lower right, we'll call them QRST (left) and WXYZ (right).
A = R, B = S, C = W+X, D = T, E = Q+R+S
F = T, G = W, H = Q-S, I = X-W, J = Q
Please replace the cache exactly as found after logging. Have Fun! 
Congratulations to ratman232 for FTF!
You can validate your puzzle solution with certitude.