umm yea i've hit larger jumps in the back country like 45 feet or so, i just dont know about the park, ive never really done a straight spin off a bigger jump in the back country just misty's and such i just dont know how it feels
skip straight spins, do corks/bios :-D It takes more balls to try but end up being much easier than straight spins. at least in my opinion. either way good luck with practice man, let us know how it goes, maybe someone else can help more?
i made that progression this year, best advice that i could give you is just buck up and do it. i hit my first 40 footer straight air, second time a 3, and third time a 7. at the time i had never landed a 720 but first time of a bigger jump the spin just came with ease just keep spotting the landing and youll stomp it.
"You only live once, it is about the adventure not the destination." - Entity$