Is there any kind of shuttle bus schedule for the outlying parking lots?

Yes

They just keep filling & dropping off, then repeat until about 15 mins.before show, I think.

Yes there was a shuttle bus from the outer lots to the venue. The buses ran frequent

Unfortunately there wasn't any shuttles for outlying parking lots. We had a 10 minute walk from the parking lot to the center.

I believe they do

Not sure, but they have VIP parking cost 100.00 dollars and no one monitors it. So you pay 100.00 and the guy next to you doesn't pay anything