I'm not sure who started it, but I think everyone registered should put the following line in their sig.
~ REGISTERED FOR CARLISLE 2009 ~
That way we know who the slackers are.
...Does anyone know the procedure to change vehicles? I registered for 3 but I may reconsider which 3 vehicles I bring?
Imtbear: you'd be the sure winner for the much coveted "longest distance traveled" award. it appears to often be presented in the form of a plastic placard, with a number printed on it. Numbers vary by year, I think.
You only need to change the info when you check in at registration, they'll modify the info right there on the computer.