If you are bringing hand sanitizer with you, don't bring the pump bottles! I saw a woman on the bus going to MK reach into her bag to get something out, and her pump bottle had "sanitized" everything in the bag. What a mess - not to mention a good waste of hand sanitizer!
I usually get the individually wrapped Wet Ones towelettes. No mess, no fuss, and I feel like I've actually washed my hands when I'm finished.
Just to note, I was at YC in December when the stomach bug was rampant, and did not get sick. I was at BWV in January, and did not get sick. I didn't even see anyone getting sick. So it is possible to go to Disney and stay healthy. Pixie dust to everyone!