One last tip -
Take notes - seriously.
If you're going to do this with any sort of regularity, noting what went well and what didn't will just help you make improvements each time you go back out. It also will help you get better and more efficient at preparing for these sorts of weekends.
Personally, Ive started to use Evernote. Now that I've cycled through a few race weekends I basically already have menu's planned, grocery lists made, etc so I don't have to reinvent the wheel every time out. I also use it to snap pictures of little details I see or ideas I steal from other setups in order to improve our weekends.