Its been our opinion to take trhe least amount of stuff into the parks to expedite the check. Backpacks with alot of pockets are going to take some time, they normally check every pocket. As others stated, have the bag in front of you, unzip the pockets, do not wait till its your turn and go therough the process, be ready before hand and it goes real fast. My wife and I each have a small Disney hip pouch, 2 compartments, and everything we could need for the day is in them, not much, camera, room keys tickets and some lip balm, any more than that and its overkill. We take a mid day break so hauling alot with us is senseless and even it the evening, we mostly go bagless, I just take a small camera case and my tickets and card fir it there also. Remember, less it better and quicker and no locker is needed to return to for other stuff.