Don't know where you got the £30 from, there was no fee at all.
Probably about a dozen cars. I went for the run out, it was 64 miles there for me and the first trip out this year for the Gransport. Enjoyed the blast.
Yes some tyres were kicked, but had a nice cup of tea and a good chat with a couple of guys that dare involved with the airfield.
Sorry no pic's.