I'll just comment on the hand-stamp thingy ... I think most people know you do NOT need your hand stamped if you have a multi-day ticket, but if you have kids - what kid doesn't LOVE getting their hand stamped?? Makes them feel important too ... our kids like to get the stamp - each and every time we cross parks, then as the stamps overlap each other - go on one of the dark rides to make the stamp "glow" so they can see the images. Just part of the fun of being a kid. My kids make sure me & hubby get our hand stamps too - just because we can.
But true, your picture is taken, no stamp needed for multi-day, park-hopper tix.