I just look at things going on in Maine in the weekends in October and there are two more new events that were just posted. So those dates are probably out now too unless we decide not to go to those events and just go have fun.
21 October Crown of Maine -- Dash for the Cache
15 October Mt. Agamenticus Work Day event
So it looks like the only free weekends would be:
7 & 8 Oct
21 & 22 Oct
28 & 29 Oct