I think you'll find dog parks a heated discussion simply because there are a lot of GTers with bad experiences and are just trying to help prevent other disasters. I've been to dog parks a few times without incident, however, I was right beside my pups at all times. I found way too many people left their dogs unsupervised and in my view, they had really badly behaved dogs. What's worse is they didn't even realize how badly behaved they were. I'm not blaming the dogs at all, but I suspect there were a lot of lazy people who just unleashed their dogs so they wouldn't run away, rather than actually train them.
A guy who's dog (not a puppy) kept jumping up on Ben and Bailey and when I repeatedly got in between them since they weren't listening to Ben and Bailey's correction, got tired of it and yelled at the owner. He replied it's impossible to control dogs in a dog park, and I left knowing I couldn't fix stupid.
If your dog is not listening to another dog correct it, you've got a training issue and it would be best for both of you to do some training. A read an artlcle from a dog behavourist who stated dog parks are frequented by out of controlled dogs so even some trainers don't recommend them.