And we used about the same amount as we do here at home. We drove to Florida this year and therefor had a car there. Were sure to stop and grab a Jumbo pack of diapers before we got into the park and checkd into WL. We ended up never leaving/driving the resort once we were there. However, there is a HESS gas station right thereby the T&TC, they may sell small packs but I am not sure. They also sel them in the hotel stores. Not sure on variety or sizing,but te Mercantile at the Wilderness Lodge did sell some I notice but didnt take too good of a look at sizing or prices. There are also Baby Centers in each park as well should you runout or be destitute. Not sure if they sell packs of diapers, but i do know they sell single diapers, wipes, formula, bottles and sippys.... DS lost his bottle in transit at AK so we went to the AK BC and bought one relativly cheap. $4 I think... nothing fancy but it worked just fine. I found that we did use more wipes than usual.... Wiping sticky hands and faces from ice cream, cotton candy, and thinsg like that. Or just to help cut back on teh germs... We would bring about 5-6 diapers a day into te parks with us and refill our baggie. I had bought one of the big bags of wipes and also had a ziplock that I would bring chucks of wipes in, rather than a big box or run out of the small cases... This was super helpful. Also: don't forget the swim diapers. They were also sold in the hotel store but I am not sure on the details...
Also consider bringing Tylonol and Ear Ache relief. DS5 came down with Swimmers Ear at my inlaws in the middle of the night - the night before we arrived at WDW. Thank goodness I had brought that "just in case"... Thanks to the Dis Boards of course!!

He was good to go the next day!
We also brought a bag of snacks... mostly breakfast stuff where we were doing the
DDP we most utilized our meals for lunch and dinners. Things like small Yogurts, Cereal Straws, pretzles, juice boxes and things like that to keep the kids at bay and from running to the snack bar all the time. Also to stash little snacks in the diaper bag and stroller to help tied them over between meals, if in transit or whaever....
Good luck and have a Magical vacation!!
