@jimk claims that the Cottonwoods are a breeze.
Cottonwood Canyon parking is not a breeze, but mostly manageable. I've been able to get free, unreserved parking there all 32 days I've skied Snowbird this season. There were probably two Saturdays in mid-winter when I might have skied, but decided not to go because of likely heavy crowds and parking issues, including one where I later heard very poor visibility was a big factor. There were a couple other busy, pow days where I went to Soli instead, and got a ride with a friend who had a parking spot. BTW, the paid and reservation systems at Sol/Bright seem to be working as intended - in my case. I have not gone up there once this season spontaneously, only when I had parking via a friend's spot.
Of course, parking in April at Snowbird is about as empty as Mineral Basin (10 apr 2024):
I confess that the idea of having to make reservations for parking is almost as big a turn off to me as having to pay for parking. Having to reserve and pay is a double turn off.
I need to have a good conversation with a couple of folks, if they exist, who happily navigate the Alta parking reservation system to see if they get parking every weekend they want to? If I was a season pass holder at Alta and couldn't ski there on any given weekend because I got shut out of parking I would not be happy. At least at Snowbird, if you go early enough, you'll get free, unreserved parking. But if Snowbird goes to reserve parking I guess I'd deal with it. There's always hitch hiking
I have heard that the reservation requirements at Sol/Bright has generally lessened traffic snarls and also alleviated the possibility of driving up there and getting shut out of all parking. But again, I don't know how many folks are not getting to ski on a given day because they didn't get a reservation before all were gone?
I discuss some of my strategies for typically successful parking at Snowbird, 7 days a week here:
https://www.firsttracksonline.com/boards/threads/utah-feb-2-9-2024.14893/#post-91337
I discuss the very challenging parking/traffic situation of the record snowfall season of 2023 season here:
https://www.firsttracksonline.com/boards/threads/snowbird-ut-winter-2023-parking-vs-liftlines.14674/