Denna used to LOVE going to the dog park, now she LIKES it... but doesn't seem as excited to play and chase other dogs as before. She did do a play-bow to a 6 month old spaniel last week, that just made everybody giggle... this 150lb mastiff bowing to a 30lb spaniel puppy?... it was pretty cute.
That was at a more controlled "park-like" environment (a large-dog play-date at a boarding facility's back lot). Someone also brought a 9 week old staffy puppy, since she assumed (correctly, in my opinion) the dogs here would be healthy and less risk for her puppy, who only had one or two sets of shots so far. That was the most outgoing, confident little puppy I've EVER seen! She'd put the puppy on the ground, and her feet were peddling before she was down - she was GOING places!! she followed all the big dogs around for a while and then went off to explore the woods. The other dogs treated her pretty well, and all the owners made sure the puppy had a good time.
I enjoy going to the dog park myself, so we'll probably go some more - so far we've gone to the big dog park maybe 4 times in 2 years, so not much... and I don't go on the weekends anymore - that's when the crazy idiots come out and talk on the phone, ignoring what ever their dog is doing.
While we've not had any major bad things happen, there are a few 'arguments' now and then - but I figure that's also a good learning experience for Denna, and I'm there to guide her in that, too... her first trip, she was being humped by a chocolate lab (neutered, just over-excitement)... she started backing up and snarling, confused and unsure what to do (she was about 9 months old then) - I told the owner my dog was reaching her limit... so she called the lab off, and I got Denna's collar, told her to 'leave-it' and started her moving forward again. She shook off the experience, and when the lab came back for more, they engaged in a game of chase instead of the humping... so, a much better ending for both dogs.
Denna also decided to chase a ball-obsessed shepherd one day... the shepherd did NOT want her along for the ride - and the owner and I were talking, and we were both aware of how things might go... so, when I started to see the shepherd getting anxious, I called Denna off - basically telling her to respect the other dog's space, and both dogs went back to having a good time. Denna went off to find another playmate - so I said 'bye to the shepherd's person and followed after her.
I guess what I'm saying, is there is risk involved, but if you recognize it, and have a plan on how to guide your dog through it - 'leave it' is a great command, along with redirection, i.e. "let's go" to get them out of a bad situation - you won't get worried, your dog won't get frightened or feel a need to get guardy, and everyone should have a good time. And, if you meet strange dogs off-leash in other areas, I think your dog and you will be better prepared to deal with it in a calm, non-reactive manner.
Idiots like the dude with the little dog in the costume... Geez. Glad the
good dog people ganged up on him and got him to leave.