Hello Justin and welcome to the Disney Parks Moms Panel.
I can just bet that both you and your lovely wife are beginning to get super excited about your upcoming visit to Walt Disney World Resort and for me, part of that excitement is found in the planning process of what to pack and what to pack it in!
To help decide on which size of bags to pack and what stroller type is acceptable I'm happy to share the current
Walt Disney World Resort Park Rules & Regulations which contains all the details you'll need to know about sizes of bags, strollers and so on.
It's tricky for me to know exactly how much baby milk your little Mouseketeer may need during your Disney day. However, please let me give you reassurance that each Disney Theme Park benefits from it's own
Baby Care Centre which provides families with a peaceful haven in which to feed, nurse or change little ones.
Plus should Guests require it they may also purchase baby formula, diapers, baby food and other handy baby sundries in any of the Baby Care Centres.
I also thought you might find this
Planning for Pre-School Kids & Little Ones link to be an extra useful planning resource for your upcoming trip.
Have a great Disney day.
~ Jane