You need more time between an 11 AM lunch and a demo at 1. You have to get from DTD, through the magical "unreliable" turnstyles etc...
Actually this whole day sounds bad. Are you driving? If so it's 'marginally doable, but.... remember the parking mess at DTD now.
IMHO you need to drop one of the three places from your day. Otherwise you are spending as much time getting to and from parks as you are in them.