I've always gotten the overall impression that Maine State Parks are not real geo-friendly. I may be mixing that up with Acadia, however.
You have to be pro-active and get cachers together to try and impliment some sort of policy for them. Arcadia won't allow regular caches but they have that great earthcache series that I think has gone really well. Start small,let's say talk with one of the state park managers and show them what other states are doing and maybe they will come around. The main point is to get something started. 2 of our neighboring states,Alabama and South Carolina now also have new and upcoming geocaching programs. Check out other states programs and even talk with those people to see what they did to get things started.
Just smile it won't crack your face
The statistics on sanity are that one out of every four persons is
suffering from some sort of mental illness. Think of your three best
friends -- if they're okay, then it's you.