I attended an afternoon show put on by a sewing guild -- not just quilting. They had tons of door prizes including a new sewing machine. Each person was given one ticket when they entered (can't remember if admission was free or just a dollar or two), so everyone had one chance at the prizes. You could buy additional tickets to get more chances. You had to be present to win, but the entire event only lasted several hours. The only problems with not needing to be present to win is that each ticket in the drawing would have to have name and contact info filled out -- you couldn't just state the ticket number as the winner -- and if the person wasn't there arrangements for pickup of the machine would need to be made.