Contest Runs

Hey, I am considering entering a couple local contests this summer, and had a couple questions about putting together a run.
First, how many tricks do you usually do in a pass? Or does it depend on the contest a lot? Also, is there an accepted order for throwing tricks (keep in mind I am a novice rider)? And my final question, is the boat often weighted for novice riders, and are you able to pick the speed you ride at?
Thanks in advance, and if there is anything else you think I should watch out for, I would love the heads up.