BCC & some LCC road info.
1) I work at Solitude and live in a condo in downtown SLC. I make the drive daily to work. It never takes more than an hour & except on huge days takes 40 minutes. Earlier is better. Being behind a ton of people @ 9am is no fun.
2) I have an AWD car so get waived thru the restricted days, I also take the bus when i can. It starts running from the lot at the mouth of the Canyon ( caddy corner from 7-11) @ 705am and the last bus down is 830pm. www.rideuta.com
pretty sure there is no overnight parking at the park & ride lot.
3) the drive is not that harry realy slow & low & you will be fine, seriously though down hill gear down so I dont rear end you.
4)In all my years ( 20 + ) of skiing all 4 canyon resorts, I have never been interlodged ( stuck inside) in BCC. ALta & snowbird have that happen more often, just a terrain difference. LCC also closes in its entirety more often. all 4 resorts get roughly the same snow and are so close together it shocks you when you get up high.
if you do have further specific questions on the resort or either canyon,
edit: removed shameless spam