somebody will correct me if i'm wrong but..
i don't believe there is a problem with having another support vehicle with you at the midnights as long as there isn't a special event going on. last weekend when there was so much going on there wasn't enought room to park in the pits and i believe mgt was having the spectator cars park in the north lot. if you pull your pickup in and then your car your racing behind it that would work great.
as robin said. just give those nice ladies at the gate a heads up that you're with a car. but for what its worth(if anyone sees this) i think when we're doing many events like the brackets, shootouts, midnights, and indexs.... unless your a support vehicle, no one drives through to the pits without a tech card.