At larger multi day events, I would be parked in my vendor space on the first day while I searched for things to buy. Second day I set up to sell. Third day was just a quick run through to see if there were any screaming deals or anything that I couldn't live without. Then it was time to head back home because most buyers don't hang around for the last day. If they do, they they aren't serious buyers looking to spend the big bucks.