I also take my beagle to the dog park and let him off leash. I only go to the ones that are completely fenced in, and have never had a problem getting him to come back to me. (although I practice recall A LOT since I am so worried about losing him ) Most of the time, the dogs (and owners) are well behaved and responsible. I did have an unfortunate and scary incident last year where my dog was attacked by a large pit bull, so now I am just much more careful about paying attention to what is going on in the park. If I feel uncomfortable with the situation, I get out of there for the safety of my dog. Overall though, I think the dog park can be a good experience and a lot of fun!