I said only to say that if people seem skittish around her. And it is NOT a lie, she is a Lab and a pittie is a terrier, so saying she's a Lab/terrier mix to someone who seems like they might be nervous is advised. Once you get to know them, and they get to know your dog, you can say that her "terrier" part is pitbull terrier, and can point out whatever positive characteristics she got from that side, and THAT will help educate.
And not every dog park is full of irresponsible people, or unvaccinated dogs. Many dog parks have rules about dogs needing to be vaccinated before people are allowed to bring their dogs in. Check out any dog park, and how she reacts with other dogs before bringing her to one, of course.
Dog aggression is not true of every pittie or pittie mix, every one is different and it is always smart to be cautious when meeting new dogs or people, regardless of breed.
Bookmarks