How can i overcome this?

okay i went to the one place and its kind of like a campground where everyone knows everyone except for me. im new to the environment (im 13) and all the kids my age know each other. well i went the first time and didn't really do anything amazing, but now every day i wake up and this fear of going there on this coming 4th of july just drains my happiness. i think im just nervous because i dont know anyone. well ill be there for 3 days and i need some tips to bond with them. help me look fwd to this trip, not dread it