One Alterra resort, Solitude, is unfortunately one of the worst offenders of nickel-and-diming their guests.
It's mandatory paid parking in all their lots, based on vehicle occupancy. The only way you can get it for free is to be a 4+ carpool.
1: $35
2: $25
3: $10
4+: Free
If you don't have enough people to get free parking, then you can avoid paying by taking the UTA Ski Bus, only to be slapped with a 12 to 20 dollar fee for the lockers when you arrive.
They claimed that "we're just trying to get people to carpool or use the bus, not make money with paid parking", but their actions regarding the lockers suggest otherwise. Whether you drive or take the bus, you get hosed either way. The only ways to avoid paying for either are to be a 4+ carpool, or boot up before taking the bus and plan to not need anything out of your bag the entire day. Both are not feasible for the majority of skiers. Management knows this, which is why these policies are in place.
Any resort saying they're not attempting to make money with paid parking is lying though their teeth.
All these nickel-and-diming schemes are also meant to disproportionately punish solo travelers, which is a problem when you're single and don't have many friends.