Al, tickets are indeed available at the gate. Looks like the Race day ticket, which covers Saturday or Monday is all that's available now, at $45 a pop. We usually get directed to the Porsche corral, which is the skidpad area. Lenny and I meet Dan O'Connell with our replicas as well as my friend Jim(911SC). David comes down from the North in his Mini, but used to come in his Spyder.
You can walk around the paddock and get REAL close to the cars. Up close last year(or the year before?) with the 1939 Mercedes Grand Prix car was awesome! Love getting close to the Ferraris, Maseratis, and especially the 908s, 910s, and 917s......
Don't bother trying to talk on your cell, but texting seems to work just fine. You are in the mountains in the middle of nowhere!