I don't really think there's a lot of active maine players on pbnation. There just isn't a player base. I think there's a couple fields in Vasselboro and gorham that still do woodsball. You might be better off trying there, or maybe you have?
If you're down for New Hampshire then head to BOLP. They've got a really solid amount of players there.
Yeah I have to agree with Sean, not a ton of good options up hear in Maine. V-Town in Vasselboro will open from groups of 10+, but doesn't really do any walk on days. Pretty much limited to the woods there...
Heard great things about BOLP... looking to get down there myself... dying to get back on the speedball course!