Colorado lift tickets
We have a trip to Colorado set for March for the first time, will be in Frisco about 2 wks, to hit the Copper, Keystone, Breck, A basin etc (public transport) and then heading to Aspen for about 5 days to check it out. Just wonderig what is the best option for lift passes, to help make them cheaper, anyone can recommend for these areas?
I am in New Zealand so cannot buy anything until we get there (or can online I guess) but want to minimise the risk, eg Copper seems to have cheaper online purchases but you have to pick a date when there, and I really wanted to avoid that, also buying multiple day passes in advance is a bit of a risk?
But any locals advise on this would be appreciated, the best way to do it and save a few dollars?