Howard,
I totally understand where you are.
Can I suggest that you learn to fly a glider... freedom in 3 dimensions. Bikes and boats only give you two!
The Long Mynd and Shobdon are not far away from you!
Looked at it since our local gliding field is just 2 miles away. Weather wise its limited and freedom it isnt. There are rules and laws that you have to obey. The sea is the only real freedom left.