Would it be feasible and somewhat enforceable to make the show and swap meet aisles "One-Way", with passing allowed?
And while we are on possibilities, how about some seating spread out among the site, and a little shade might be asking too much?
What would be the purpose of traveling one way? Does the virus only go a certain direction in the outdoors so this would cut down any potential spread? That being said I hope the show goes on successful and it's not ruined with regulations..
Theoretically - in stores with shopping carts - people wouldn't pass close to each other much and the cart would maintain distance when several people are in an aisle. I think they have pretty much stopped that here now, along with limiting the amount of people in stores.