What we need to do is organize a cooperative. File for incorporation, and then file to sell shares.
Set the share price at ~$50. File to sell 10,000 shares. For the math challenged, that's a half million dollars. We don't HAVE to sell all 10k up front. Set a minimum number to be sold before starting the business.
The Coop then buys the land. Every person that buys a share has part ownership - we can't *subdivide* but we can all be joint owners, so to speak, through the coop that owns it.
Just buy the thing first, then we'll figure out what to do with it.
Set up a "fee booth" at the entrance/exit to the trails with "on your honor" fee stuff. $5 each? Whatever.. make sure you make enough to at least pay the taxes every year.
Or better yet, roll the money back into the coop and buy the next lot that comes up for sale.
Oh yeah.. we'd need a catchy name for the Coop.. something like..
Environmentalists for Access
Oh.. and let's not forget the big signs all around the property "PRIVATE PROPERTY - NO TRESPASSING - UNLESS YOU'RE MOTORIZED"