The given co-ords take you to a place where I have often passed a happy hour although now not as often as when I worked in the toon. In a very general way it might be a slight hint. The cache is a short walk away.
You need to find the numerical value (A=1, Z=26) of the first letter of:
A: Hamlet's younger brother;
B: She who hunted a wren in a 4 wheel drive Toyota;
C: He who was first to the South Pole but then met a sad fate;
D: The polar bear's wife;
E: The biker who rode a Grecian 2000;
F: The real person accidentally killed by an alter ego of A;
G: The connector (first word).
The cache can be found at N 54 58.16(A+C)+15(B+G)-1 W 001 35.30(D+E+F)+31G.
You will need to bring your own pen(cil), tweezers and, depending on stature, possibly something else.
You can check your answers for this puzzle on GeoChecker.com.