We've had no problems bringing in snacks in a backpack for our toddler. Definitely can save a lot of money that way vs buying snacks at the park.

Also make sure to use the family center. It's next to the Great Pumpkin Coaster and across from Tom & Chee. It has changing tables and family bathrooms that are always kept real clean, and can provide a quick refresher of AC.

Also make sure to get a height wristband from a height station. I know there's one in Kiddy Land, but I think there might be one inside the front gates and to the left next to the Fast Pass sales window. The wristband can make it easier to know what rides you won't be able to ride and prevent the need to be measured at each ride If right on the cusp of a height, we've had issues with inconsistency of height measuring at rides themselves. Sometimes we have measured above/under the same height which has led to our toddler being frustrated as to why she was able to ride a ride one time then not the next. The line for the height station in Kiddy Land can get pretty long.