I know after last year I suggested it be done like it was at Jeep Beach when I went a few years ago. You could buy as many tickets as you wanted but they were divided. All your big items like a bumper, winch, tires, nice lights, ect each had their own bucket and you picked how many (if any) of your raffle tickets you wanted to put in each bucket. Then they took the smaller items, divided them into groups (probably based on price) and each group of prizes had a bucket that you could put as many or few tickets in as you wanted.
Great idea esp for things like if the bumper that is given away fits a JK but you drive a TJ you obviously you dont want it so you wouldn't put your tickets in that bucket or if you REALLY wanted tires you could put all your tickets in that 1 bucket.