Thanks for all the good information. Really hope to make Silverton. Originally I had planned to buy their pass, but benefits were not there this year and cost was up.
This thread has definitely been a great help to myself and if someone picks it up on a google search hope it helps them too.
Choose the Sierra at Tahoe Pass because it was cheap $400; Powder Alliance; 4 bonus days at Squaw/Alpine.
There are now tags for "Mountain Collective Pass" and "Powder Alliance" to make it easier to find threads like this in the future.
Hope there will be an on-going trip report once you get on the road . . . hint, hint.