Charge an entry fee per quilt to be shown. Don't bog yourself down with a different fee for each different quilt size. Just choose one cost per quilt, or offer something like "$10 for first quilt, and $5 each quilt thereafter". You may need to limit how many quilts can be entered per person if the show becomes too large as time goes on.
Categories can be of your choice. King, queen, lap, crib, table runners and totes, accessories (jackets, etc.). Consider displaying antiques! Everyone loves the antiques.
Since finding and paying for a qualified quilt expert/judge is difficult, think about holding a "Viewer's Choice" quilt show. Give every attendee a ticket to write down the number of their favorite quilt in each category. Give the winning quilt owners blue ribbons to take home, or ask quilt stores for gift certificates as the winning gifts.
You will need to decide how to display the quilts. Twelve foot wood 4x4's inserted into "X" bases have been found to be the most stable. Narrow metal rods, narrow PVC pipes, or heavy rope strung between the posts will be needed. Hang the quilts by clothespins on the rope, or use men's pant hangers if using the pipes.
Label each quilt with a number that coordinates with a recipe card that has the owner's name, address, and phone number on it. You will need to decide how and when to receive the quilts for the show. You can designate a drop-off and pick-up site.