No need to have your car "finished" or even "started". Just put a sign on it that states what your plans are for it, and what you have done so far.
You have to get there some how, right? Why not enter it and get into the show for 3 days, not have to pay for parking, and you won't have 5 miles to get back to your car with all the parts you buy.
UPDATE: I have applied and paid for the tent (we have a tent). Again, PLEASE support this site and the club (PCCA); when you register please make sure you state you are with PCCA.
Also, please post here if you plan to go.
Bill