Normally they do not rent for one weekend only. Vendors typically have a specific booth they get and maintain for a long period. The walls are finished, have electricity, and are often painted, and stocked for the long run. Booths are locked during the week, and on a weekend re-open they are ready to go. On occasion there may be an empty booth for a few weeks, you have to go ask at the office if they have the space for you on some weekend. But then you would be moving in on Sat. out on Sun. Not too much you can establish in that time.
Don't know sorry
I don't think so, not sure
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