Good call to extend to the extra day. Both Snowbird and Alta are great. They are different and it is nice to spend enough time at each to appreciate the differences in terrain, culture and vibe. At Alta you have to work a bit more for the best terrain and snow, more traversing, tight notchy entries. The skiing can be intense, but I find the vibe more mellow. Snowbird is more point and shoot, pure vertical. I find the vibe at Snowbird more aggro. Both are cool.
With only a day and a half, I'm not sure that I'd zoom around back and forth both days, trying to experience everything and in the process experiencing nothing. Given that you are staying at GMD, I'd focus on Alta day one. Enjoy it, you could spend a season exploring Alta alone. The afternoon workshop would give you a good template for how to ski Alta and access cool stuff that you probably wouldn't try or find on your own.
Based on what you have said about your skiing, I'd start in the Sugarloaf area (take the rope across the base to start on that side), work over to Supreme, then cross back over to the Collins side in the afternoon. If viz is good, Ballroom is fun and wide open. It wouldn't be crazy to just stay at Alta for another day. You will barely scratch the surface in a single day. But if you want to see Snowbird on this trip, that is valid, in which case, on day two, if visibility is good, drop into Snowbird under the Baldy chair from the top of Sugarloaf lift. Then spend a couple of hours doing open, big mountain stuff in Mineral Basin, Regulator, Little Cloud and options off the Cirque if you are up to the entries. Then pop back to Alta, crossover to the Collins side, Alf's High Rustler back to the GMD. If viz is poor on Sunday and you want to ski Snowbird, focus on the trees and steeps in Gad Valley rather than the big, open stuff - but I think Alta is more fun when visibility is not great.
Have fun. I just returned from 5 days of Alta/'bird, all powder days, which reminded me that it is kind of crazy to travel anywhere else.
With only a day and a half, I'm not sure that I'd zoom around back and forth both days, trying to experience everything and in the process experiencing nothing. Given that you are staying at GMD, I'd focus on Alta day one. Enjoy it, you could spend a season exploring Alta alone. The afternoon workshop would give you a good template for how to ski Alta and access cool stuff that you probably wouldn't try or find on your own.
Based on what you have said about your skiing, I'd start in the Sugarloaf area (take the rope across the base to start on that side), work over to Supreme, then cross back over to the Collins side in the afternoon. If viz is good, Ballroom is fun and wide open. It wouldn't be crazy to just stay at Alta for another day. You will barely scratch the surface in a single day. But if you want to see Snowbird on this trip, that is valid, in which case, on day two, if visibility is good, drop into Snowbird under the Baldy chair from the top of Sugarloaf lift. Then spend a couple of hours doing open, big mountain stuff in Mineral Basin, Regulator, Little Cloud and options off the Cirque if you are up to the entries. Then pop back to Alta, crossover to the Collins side, Alf's High Rustler back to the GMD. If viz is poor on Sunday and you want to ski Snowbird, focus on the trees and steeps in Gad Valley rather than the big, open stuff - but I think Alta is more fun when visibility is not great.
Have fun. I just returned from 5 days of Alta/'bird, all powder days, which reminded me that it is kind of crazy to travel anywhere else.