I love that area, but unfortunately got skunked on trip #1 three weeks ago before the snow came. In any case, while Altabird is fantastic (Snowbird is a toss-up for #1 against Whistler for me), although there are a fair number of flats, that if you don't know about get old fast.
Consider that if the snow gods are happy with you, the Park City areas could also be great for your purpose. They are a lot lower than Altabird, so if you've annoyed Ullr, he may make it wet spring conditions, but there are LOTS of blue / green at Deer Valley, Park City and The Canyons. Likewise, one canyon over from Altabird is Solitude and Brighton which also have a large selection of intermediate trails.
Oh, and in your poll, Arapahoe Basin isn;t remote - it's just sorta up the hill from Keystone.