My DD-5 just went over President's Weekend, and loved it...
We were staying at OKW, so took us an hour to get there... Bus to MK, and then either Monorail or boat ride to GF.
Weather can be cold on the water, so I dressed daughter in jeans, long T-shirt, and sweat jacket, and she still was a bit cold.
We went to the GF cafe, made reservations for 9:30, ate leasurely until 11:30 pickup, and then saw all the goodies.
We then took a boat ride to MK, put junk in a locker, and were off.
My Hint is to make PS for the GF cafe so you can relax while waiting.... unless of course you are staying at GF, and then can go back up to the room.
These book up fast, so find out how far in advance you need to call.
FYI - I bought my daughter a disposable camera, to use for this and the Tea Party, and worked out well. Put a sticker with her name on it, in case it got lost.