The hundred mile wilderness is free, but don’t forget about the campgrounds at Abol Bridge. There is a private one and a Park Service campground both of which ask for money. I don’t recall the exact amounts. I believe there is also a fee to stay in Baxter at Daisy Pond though I’m not sure on that one. Best thing to do is check one of the handbooks or with the ATC.
Beware the mosquito gauntlet from Cooper Brook to Rainbow Lake. Had to hike in coat, pants, hat, socks over my hands and bandanna tied around my face in 90 degree weather. We were there June 14-15 2002.
Grimace