My brother is the event manager for the show and told me today that he needs a couple nice cars for the Invitational Display. The cars are all kept inside and roped off from the public and the building is locked at night. If your car is selected there is no cost to show your car and you will get two passes to get into the show for all three days. He's looking for classic imports of any kind but they must be very nice, very rare and/or very interesting. For example he's had a Datsun fire truck, Scarab Z, custom turbo 260Z, a couple 240Z race cars, etc. Other cars that I remember are a 5.0 Volvo wagon, a 1966 Volvo P1800 with almost 3 million miles, some TV cars, etc.
Another way to get in for free is to show a race car. Show your race car and you get 2 people in for free and it includes on-grounds trailer parking. All race cars are kept under the pavilion which is nice since many of them don't have windows and some don't have roofs.
This link shows some of the cars entered for the Invitational Display (Bldg T) and race paddock (Pavillion). There's a link for "the invitational submission form" in the paragraph at the top.
http://www.carlisleevents.com/carlisle-events/carlisle-import-and-performance-nationals/carlisle-import-and-performance-nationals-invitationals.aspx
I will be there with 5 vendor spaces of mostly Z parts and I'll probably bring my 240Z race car, 78 620KC and maybe the Pantera and Lotus. FutoFab was there last year and I hope this year too. You can expect over 2000 show cars, 200+ parts vendors, autocross, drifting, rolling exhaust competition, burnouts and more - See more at: http://www.carlisleevents.com/carlisle-events/carlisle-import-and-performance-nationals/default.aspx#sthash.AF1n6jlD.dpuf
http://www.carlisleevents.com/carlisle-events/carlisle-import-and-performance-nationals/default.aspx
Chuck