The wife and I are thinking of doing a family trip to the races this year, but I've never been, and I'm concerned (as I almost always am) about what I'll be exposing my kids to. If we go and the folks get BUCK WILD...well, I'd have to hear it from the wife, believe me.
They do a really good job of setting up a family camping area, that is enforced by RA security at all times, so, pretty much after 9:30/10pm its quiet. But, on the other side, they caryr on untill like 4am, burning potajohns and just generally rasing heck.
You may seriously look into getting a hotel room, that time of year its normally un-mercifully hot and the shower facilities @ RA leave alot to be desired.