Howdy Anastasia! Due to space, I am going to highlight a couple of items and focus mostly on your little one. Please continue to send questions our way so we can assist you in your planning.
I suggest that you get park hopper passes so that you can enjoy more than one park each day if you would like. Be sure to book your dining at 180 days out from your reservation (MUST DO) and check out
Things to Do so you can begin making a list of the attractions you will want to experience.
Some of this might seem excessive but I want to ensure your 2 year old is comfortable when you are at Walt Disney World. Be sure to pack any age appropriate and doctor recommended medicine that you might need. Hopefully you won't need any of it but it's better to be safe than sorry.
There are Baby Care Centers at the 4 theme parks that are wonderful areas that are free of charge to use. Great locations to change your toddler if needed. They also have a small area where you will find a variety of items available for purchase: food, medicine, diapers, swim diapers and more.
Be sure to pack a small blanket or towel to cover your stroller when you are inside an attraction. The strollers get hot in the sun and the towel or blanket will protect sensitive skin.
Sunglasses are another must have though my two little ones never kept theirs on. Be sure to have sunscreen on hand as well.
When my kiddos were younger, we pre-packed their clothes in plastic quart size bags; one outfit per bag. Each day, we placed a bag of clothes for each child in our backpack. If either of our children needed to change their clothes, we would grab a bag, change them and then place the dirty clothes in the quart size bag.
I hope this will help you in your planning. Please let me know if you need any further information. So excited for you! I know you are going to have a magical vacation!!