Although I would not even think about attempting this trick at the age I'm at, I recommend doing a lot or trampoline time.. find an indoor training facility for the off season practice. In Summit county, we have Copper mountain's woodward barn where you can practice any trick all year long.
Yeah I got a tramp in my backyard. I have only doubled frontflipped on it but honestly I know I can do it if I find a good enough jump this year I'll just huck & hope it works. I doubt that though so summer training is most likely going to happen.
Although we did just get some fresh snow so I'm going to go out on the weekend with my sled looking for a good spot to build a jump.