While completing the WINCAT, Moni and I discovered the lack of large caches in the Saint John area. We set off to find two larges ones only to be defeated by snow. So, this one is a large winter friendly cache. Hopefully the muggles of the area will leave it alone for a while.
The best way to appraoch this cache is to drive down Edgehill Row until you get to a fork that leads to a guardrail over looking a steep path. Park there, and go around the gard rail. Your GSP should do the rest of the work. Although, because of the tree cover, my coordinates were jumping around a bit.