In the back roads of the North Country of NH, it is easy to get turned around and lose track of where you are. Sometimes there are landmarks and other visual aids which will help you; other times there are things that won't help you. The final location serves as an example of something which will not help you find your way.
Note, I'm not providing a geochecker for this cache because you won't have service in this area. Instead, I will provide checksums so you can validate your solution in the field.
STAGE 1
The posted coordinates will bring you to STAGE 1 where you will see a sign with a three-digit number on it (checksum=18). The number is ABC and will be used to calculate the coords for STAGE 2: N 45 12.DEF W071 06.GHI.
D=A-3
E=B+7
F=C-5
G=A-4
H=B+8
I=C-1
Checksums for STAGE 1: N 45 12.DEF W071 06.GHI
D+E+F = 17
G+H+I = 21
STAGE 2
At STAGE 2, you will see a sign with a four digit number on it (checksum=16). The number is JKLM and will be used to calculate the coords for the FINAL STAGE: N 45 14.NOP W071 06.QRS.
N=K
O=K+L-J
P=J+K
Q=K+L
R=L
S=M-J
Checksums for FINAL STAGE: N 45 14.NOP W071 06.QRS
N+O+P = 12
Q+R+S = 17