years ago I did a lot of craft shows back east when craft shows were in and still had hit or miss sales. the best show i could image was where all vendors left their hand crafted items home and just brought snacks and a soda machine. everyone eates and has something to drink
most people were nice, but there were always a few people who felt they needed to make a tacky comment
the key was to have several inexpensive items which might sell and don't go overboard on making a large number of any item specifically for a show, place some expensive great items in prominent display to get people to stop and check out the rest.
If you find other vendors with items you like, barter is a great way to trade your hard work for some things you like