What are the chances to get a subforum associated with the National, State, and local parks? I think getting some input on say which camp grounds, lodges, or even bike trails would be a good addition. Some parks have trams and others have nature centers that would be great to get out as summer approaches.

I think if it generates enough threads to warrant a subforum, then it makes sense.  Otherwise, I'd start out with a simple National/State/Local parks thread and see how that goes first in the Environmental forum.