Awsum, there are two different locations for the hospitality tents. One is at the car corral, the other at Pit Road. These are two differnt physical locations. Package one gets you into both locations, package two is just for the Pit Road location and not the Corral. I don't think anyone (except maybe the estranged StormCat) will sit in the car corral during the race and events. I have already made arrangements for a litter box for the StormKitty.
What Frank says is correct. You want Package 2 ($450) + additional guest ($300). The car corral will have some additional giveaways and raffles and stuff, but the main attraction for GT owners is the Pit Road Patio Pass (which is included in all packages).