Can just go to sell and pay the same day, also what time is the best time to go to set up my merchandise, and Who I need to pay and How much?

Yes, I would have your stuff set up before 8. Someone will come around and collect from you.

Go early, my son and I got there a little after 7 and wished we got. there by 6! Flea market opens at 8 am people are already there buying! Tuesday and Saturdays are free, and Sundays it's $14.00 per space taken! We were told Sundays were the best, not sure about other days mentioned! Very nice place to go!