If you are a rookie to the camp circuit, take all these guys advice. But also make a good impression by working hard, hustling, staying in your primary, be patient and see the whole play, be a good partner, have excellent communication which includes if possible a quick pregame (at least get your partners names). Like advice I got from one of my assignors...make every call a Division I call. CALL THE OBVIOUS! For being a rookie, don't be afraid to jump in if courts need coverage, but don't kills yourself...or mentally or physically you'll be drained and bound to make mistakes.
Always...look the part and know what to bring and bring extra (including safety pins, extra socks including black and white, extra shoes, pants...just in case, etc.).
good luck!