I bet Bear will like going to the dog park, it sounds like she does get along with dogs fine. =]

It definately just sounds like she's a bit protective over her own territory. Thats how our dogs are. If there is a strange dog in our yard our dogs will bark and bark and growl... Though we've taken both out into public places and they're perfectly fine. Total sweethearts!

Good luck with taking Bear to the dog park, and let us hear how it goes! I bet she'll make plenty of friends. =]