I went with my brother in an ordinary tin top (i'm working up to buying a lightweight next summer). It was my first kit car show, and i thougth it was pretty good, and worth the money, tho i wouldn't bother going again, unless as a hoodie (and got in cheap).
The only real problem i had was with signage to the event. After seeing my first sign for donington park (i've never been before), it was nearly 2 hours before i found myself at the right point, and parked up. I think the icing on the cake was after pullling in to the correct entrance ( :gdit: ), there was a sign pointing right, when we needed to go straight on! /rant