Yes, SOS shopping is the VP battle, but it's a little different. SOS shopping is when everyone going is looking for specific SOS cards (usually 5 star or other specific ones). We leave (either in the beginning or after the first round) if the card isn't one that's wanted.
As for the time, since Steveo is the one hosting this event, you should probably contact him to ask about the time. Personally, I prefer to go later...Gives me time to get everything done and be ready when it's time.
If you're looking for an earlier VP, Sunday's are perfect.
Ahh, just saw the pac time thing...Personally, I don't mind going 30 minutes later, but since Steveo hosts, you should probably pm him and see what he says...I don't know what everyone else's schedules are like.