My wife and I were at the rv show in Timonium and filled out a free camping raffle for The Gettysburg Battlefield rv resort. We got a call last night telling us that we are getting 30 days free camping if we come to see the resort. I know that free is a dangerous word. I'm sure there is a catch. This resort is owned by Travel Resorts of America. I am looking for advise, should I stay away from this kind of thing?