You know, the first time we went it was all so new so I had typed up a few pages of notes of affordable restaurants I knew my kids would eat at (back when they were more picky), things I knew we wouldn't want to miss and show/event times but honestly, we rarely pulled it out of our backpack to look at it. I packed my brain full of information from here and that carried me through the days and we had great success and a fantastic time.
If there are things you know you will forget or important notes to make, I would recommend bringing a little notebook with tabs to make it easier. Or even create "Notes" on your smartphone, since you likely won't go anywhere without that. I put the events in my phones calendar that I knew we didn't want to miss (Aladdin, etc) with alerts before they started. That helped.
I think before you go for the first time, everything thing you think you need to remember seems so overwhelming but I found that once we were there and saw it for ourselves, everything made more sense. It's really not as complicated as it can seem on here but the knowledge you gain here is sooooo helpful!