Never been to a dog park, always stuck close to home. Know most of the dogs in my area. Don't think I'll use the dog park close to me (my own personal reasons), but if I did, I would make sure I was in full control of my dog, if intact. And even neutered. It really is my responsibility, whether going to a dog park, taking visits to pet stores or dog friendly establishments, or just walking in my neighborhood. Most dog owners, unfortunately, don't understand the true responsibility needed when out and about with your dog and keeping him/her safe to enjoy that time. I'd pick an off time (like suggested already), and get to know those owners that feel like you. I see the importance of socialization for dogs with people as well as others. Labs seem to enjoy the play with both humans and other dogs. I think I'll either get some opinions of where to go from the breeder, as well as the trainers at puppy class. But most of all, I need to feel truly confident that I can control my pup.
Sorry for being long winded, but don't want you to feel discouraged to go back to the dog park. It's really can be a nice social tool, but I think picking and choosing when to use it and the dog owners that are there, isn't a bad thing. Makes things so much more enjoyable, and isn't that what dog parks are for?
KAZ