Given the limited space, go up with vertical shelves, bookshelves or whatever you can fit on your space. If you have a wall behind you, perhaps you could display your items on the wall, always ask first if that is allowed, as a couple craft fairs I've attended do not want you to put anything on the walls, or on the drape in front of the table. You could make tote bags, aprons, pot holders (with Insul-Brite and maybe Teflon (silver) fabric for backing), placemats with napkins, table runners, small baby quilts, anything that would make good Christmas gifts. I've always found that people don't necessarily want to spend a lot of money, but the reverse is also true. These comments may be confusing, however, there is no crystal ball that tells you what will and what won't sell, however, practical items usually do sell well in my experience. Also, be sure that your items are well constructed, no threads, open seams, etc., it shows that you are a craftsman and take pride in your work.