Mark thanks for your reply and I only have a few comments. There is no place to launch a cat here in my town anymore unless you find private land. There are power boat ramps but they are not cat friendly (low draw bridge between bay and ramp with 5 knot current). We have gone to the town and pleaded for access and been turned down and no boat can be left on the beach overnight. We tried to have a regatta and we had to rent the entire parking lot 2,000 per day even off season. There is a yacht club but no beach access and one really steep ramp on the sound side and no beach.
Your nephew needs to check out IMBA for his mountain biking they help clubs get grants, build trails provide insurance. We had our only trail close down several years ago when someone fell and broke there neck and sued the county parks. We did get the trail back open by joining IMBA to provide insurance and help educate the county. We now have a second park opened and just received a 20,000 grant for trail work. Most of the trails are built and maintained by the riders but we do get some financial help from the parks. We have also been contacted by another county to start another park/trail. I guess my point was to help your nephew and when our first trail closed it was just a local group of riders building the trails when the county closed the park. It took the IMBA organizations help to get the park to reopen.
I guess your last comment about a beach and a mountains value is a little hard to understand. Beach access would be a 8'-10' path from road to beach or just a ramp to the water with some kind of ground to pull you boat up. I think most beaches are public to the high water line and have public access. We have the beach paths they just put post in the middle and passed a law for no boats its not about land. Mountain biking takes a lot more space as most trails are 4 to 35 miles long so you do need a lot of land.