Family is important, but it sounds like you are about to go into your senior year in High School right? you should CALMLY talk to your parents about wanting your space and be given time to do your own thing because of how much older you are getting..or rebel like i did when i just started coming home drunk (not the best option). And just let them know that you think its time to go hang out with your friends and celebrate the Fourth in a new way without the family, they might understand.
O as for the uncle...punch his teeth in #swag