Good jump for backflip: kinda steep lip, should kick you like 5ft in the air, 12ft long. Front flip, little less steep but definitely needs some kick, 12-15ft table. Just commit, if you can do that stuff on the tramp you can likely do it on snow, dont freak out. Youll likely throw your first one, come close to landing it and think 'why have I never done this before, its so easy.' Charge.
'I would be embarrassed to constantly complain about my life considering all the freedom and opportunities we have today. People that can't find anything they enjoy in life simply aren't giving it a real try.' ~Nick 311