It's been a few years, but I seem to remember it in the $50 - $60 range. I'm sure you can contact VB front desk ahead of time to get a price.
As to availability, because it's off-season and a private club, we were one of the few actually on the course. I thought I saw that you were going in a few weeks, so I'd suggest either early in the day or twilight, though, just due to the heat - regardless of where you play!