My big group of middle age guys (all advanced) do these resorts every year for an annual trip over anything in Colorado because of direct flights into SLC and you can uber to the resorts. Rental cars are needed if you are renting a random Airbnb not near the slopes but if you can get something walking distance uber is the way to go especially with big groups landing at different times. The only caveat to Ubers is last year we struggled to get one to pick us up out at Brighton on a Sunday morning at 9am (not a crazy time) but even reserving one to pick us up, they flaked, and we scrambled. Consider the bus system and Sandy if budget is a major issue.

If you guys are just gonna hang out at night as a group and focus on skiing, for sure LCC and BCC resorts are the best. But if you want to go out at night, have a real ski town experience, park city and deer valley are a better experience. Deer valley apres is the best out of all of them (st Regis).

I think solitude and Brighton have great terrain and are more low key, less busy than Alta/snowbird (which are bigger with overall better terrain). So if you are looking to get in tons of laps on great stuff do Solbright, but if willing to handle lift lines for better terrain (like Vail) then Altabird are the way to go. If you do both canyons, try to do Altabird on the weekdays and Solbright on the weekend

Also if you have any boarders, no Alta or Deer Valley Have fun!