Here is a list that can come in handy for craft fairs.
Check List:
Table
Table Cloth
Chair
Displays (risers, mirrors)
you can use the boxes you transport your items as risers just cover them
with table cloth or any material
Business cards
Signage
Extra price tags
Mail List sign-up sheet
Receipt book
Calculator
Cash box
Cash for change
Pens
Note paper
Packing materials (for delicate goods)
Shopping bags
Apron with pockets
Twine, masking tape, scotch tape and duct tape
Scissors
Glue stick
Tools of your craft
Snacks, drinks and a cooler
Garbage bags