First things first. Right now you should be buying an epic pass and a mountain collective pass
Epic Season Pass | EpicPass.com
The Mountain Collective 2014/15 Pass: AltaSnowbird, Aspen/Snowmass, Jackson Hole, Mammoth, Squaw Valley/Alpine Meadows, Whistler Blackcomb
unfortunately sold out for now..... Keep an eye out in fall for them again.