I have some!

I think this thread would be fun! Hydroguys tips are more "navigating the park" not the little details that can make or break your day!
We get those lil dog tags at PetSmart and put "If child is lost, call #123-4567" and we put both of our cell phone numbers on it. We clip it to their shoelaces or belt loop and tell them if they get lost to point it out to the CM. Its just a little thing, but for $5 its worth some piece of mind. It also works better than writing your phone # on their hands (washes off).
Bring your own water bottles and fill them up in the drinking fountains as you go. That saves you a LOT of money!!! We don't buy drinks unless we have to.
Bring a backpack, its easier to carry than a diaper bag/purse/etc. If you dont want to carry it around all day, rent a locker and keep your stuff in there. DL is manageable enough that its not the end of the world to hike back up to the lockers if you need something.
The First Aid Station is HEAVEN SENT! They are soooooo nice there. DS was sick with an earache the night before we got there (of course)

and we had already given him his Rx but his ear still hurt, so we needed some Tylenol to supplement. I couldnt find any in the gift shops so I ran over there to buy some and the doctor just gave us some...for free! I just had to sign a list. And he was so helpful, "if DS needs to lay down, we have cots, just bring him back and he can rest a bit and we'll give him a heat pack for his ear" I was so pleasantly surprised! So when in need, go there!
Also if baby is getting fussy and you just need a break, the Mothers Lounge is a really nice room. They have diapers, etc. and you can just chill for awhile. So nice that you dont have to go back to the hotel.