Those are about right.
Go through the car tonight; top off fluids, add air to your tires (so you don't need to scramble to find compressed air source tomorrow), check if lugs are tight, check if battery hold down is tight, leave unnecessary things at home (to reduce clutter and shorten unloading and pack up times tomorrow), and bring blue painter's tape if you don't have numbers.
If you have a tent, bring that too so your buddies can have a shelter from the hot sun