We went from the tractors to the cars, interrupted by another visit with friends from the past. There weren't very many old cars, mostly cars from the '50s and 60s, but they were fun to see. I don't know anything about cars except for getting me places, so don't expect any sparkling detailed commentary! All you car buffs out there can fill in the gaps for me.
Just by chance, I found this drone video of the Rocklyn Car Show. I hope it works for you.
As for my wheelchair, I had no trouble on the grass for moving around, but the gravel laneways all had some damp spots. I spent an hour cleaning out the grit and mud from my wheelchair tire treads before I was allowed back in the house. At least I've learned to do a lot of this stuff myself!