Parking is a challenge for the club and one that we have on our open issues. We are looking for land to build a groomer barn and a large parking lot on the trail system but no luck yet. Just a couple of acres is all we'd need.
As Bob mentioned, Wells Road lot has typically had the most space as the town has been doing a great job clearing it out and pushing back the shoulders of the road so we can park on there too. But even then we can only get at most 15 rigs there. Moser lot will hold another 5 or 6 and spruce mt road will hold about 4-5. Bottom of Ormsbee can hold 6-8 or so. So add all that up and you can usually find a place to park though it's possible you have to drive around a little.
Your directions comment is noted and i'm going to update our Trail map page (eventually) with links to Google maps for directions from exit 16 of the northway or maybe the town centers of Greenfield and Corinth.