Welcome to the DIS! We were just at BCV last week and SAB closed at 10pm. I'm not sure what time it opened but it was open when we got there around 11am.
Parking? Are you asking about a place to set up camp at SAB or parking in the parking lot?
If you're asking about where to set up camp, we were always able to snag a table in front of Beaches & Cream except for one time when I took a table at the Yacht Club end between the sandbar and the kiddie pool. There are lots of loungers though if you can't get a table.
I don't know about parking in the parking lot as we never drive or rent a car.
At BCV there's no really, really good view and no really bad view either. And you pretty much have to stay where they put you anyway. I've had pool view and enjoyed it and had a courtyard view last week which was okay too. Too hot to sit outside much anyway.
Enjoy your stay! You'll love it there!