Hey Tom,
There are several tents and tables there where we will be hanging out during class and for cooling off in the afternoon. The morning should be pretty nice and then warming up later. I think if you are concerned, you should bring your own stuff so you are comfortable. I may bring my EZup and chairs so I don't have to worry about shade and relaxing, but I am trailering too so it's easy to throw that stuff in the truck. The thing is, there may be quite a few people at Track Day so it would not be a bad idea to bring your own stuff. Snacks and dricks are always good to have around but we are going to have a blow out BBQ lunch and water for you. I would just bring what ever creature comforts and stuff you think will make your day that much more enjoyable. But it is a race track.
Talk soon, John