Tantrums, Scarecrows and 360s

I just got back from a week at a lake an hour or so away. My boat licks but i have to make due with what i got. I was just doing a bunch of lipslides and 180s and stuff like that. But later on this month i am going camping with my neighbors and their mastercraft prostar. i gotta get some good tips on some tricks. I've got no problem jumping the wake both ways, and i can spin 360s like nothing but i can't quite get the handle pass down. Last year i tried some tantrums but wasnt totally getting the full rotation on it. If anyones got any tips on how to make these tricks work a bit better for me, that would rock. Also, i can whip around scarecrows on my trampoline on an old board with absolutely no air. I was wondering how much different they are on the water. Thanks alot