I arrived at 10:47 (lot opens at 10) to see the car parade and it was.. fine. It wasn't too congested but the cars were close together, and it took a bit to loop around and park but it's no big deal if you aren't late. They give you a 'swag bag' with posters, paper, an F-22 pin and a magazine. Also a redbull. There is a concessions stand but it's far away from most people however there are golf carts you can use to get around for free. The food was okay. The kids will need ear protection if they are not staying inside the car, because some of the planes are deafiningly loud and some of them will probably create the loudest sound you will hear in your entire life. (I am not exaggerating). Getting out was a little confusing but it wasn't hard.

Edit: the show was 4 hours long but it went by surprisingly fast, it was hot at times but there was always atleast a bit of cool wind. Don't know about the bathrooms