Yeah, if they aren't jerks. Keep them on a leash and pick up after them. If your dog bites someone, that's your problem.
Yes. Drop your heap in the show area and put your shiny enclosed trailer out back where nobody has to look at it.
Bring what you need to survive. But support the food trucks so they come back next year.
Your car gets wet. The show goes on.
No. Use the money you saved to buy a tow strap.