Hey the Dog Bar is great! We had our sheepdogs out there for our daughter's sheep god's birthday party (yes these things are real!) The were a lot of dogs running around and ours got into the mix (and they loved the twin miniature bulldogs they met). We had a good time.
The only down side were some of the owners who wouldn't keep an eye on their dogs at all. There was one in particular, a born and white dog with an orange color that was running around growling and harassing the other dogs while the owner wasn't paying attention in the least.
You'll have a great time if you just keep an eye on your dogs and hope the other owners do as well.