Speaking from adventure racing experience...

I would try to eat a little protein, however you can stomach it. Hammer and Accelerade both make good products. 85 degrees is really warm for racing. You'll definitely want some sort of electrolyte product to replace what you sweat out. Maybe an extra set of clothing...riding in sweat-soaked shorts is no fun.

We usually lay our stuff out on a tarp in the TA. If you everything in one bin you'll spend a lot of time rummaging through it.

Good luck!