The far side: Base 64 - Midvale High Mystery Cache

Placed as one of the Far Side series of caches for the second of our two Geocaching events in the summer of 2012 held at Crombie Country Park. Please do not look for before 8th September.

The park is 102ha in area and includes Crombie Loch, broadleaf and coniferous woodlands, childrens play areas, orienteering courses, nature trails and woodland walks. Picnic and barbeque areas are available all year round and marquees can be hired between April and September.

On the loch you can see Grebes, heron and a variety of water fowl. The woodlands are home to red squirrels, woodpeckers, roe deer and hedgehogs.

Decrypt the following to work out a, b, c, d and e then go and find the cache.

SSBkb24ndCBiZWxpZXZlIHlvdSBoYXZlIGp1c
3QgZGVjb2RlZCB0aGlzDQoNCmFiIG1pZ
2h0IGp1c3QgYmUgNTYgIA0KY2RlIG1pZ2h
0IGp1c3QgYmUgMDAyDQoNCg==

N ab° 33.417 W cde° 46.325

You can check your answers for this puzzle on GeoChecker.com.