We are just home from 10 days in WDW, and we found it very easy to share from our meals with our dd 20 months. I did travel with several of those gerber toddler meals, just in case, but I brought them all back home. We were a big group (myself, dh, grandma, and kids ages 12, 11, and 6 in addition to the 1 year old) and there was always more than enough to share...especially table service where everyone also had an appetizer in addition to a meal.
I did bring some toddler crackers from home for snacks and we also purchased containers of fresh fruit with snack credits at our resort food court. Plus, several of our TS meals were buffet and one was family style, so dd was allowed to eat from those places for free. And something else nice, at each ts meal we ordered a kid cup of milk for dd, and we were never charged for this...they accepted the dp credits and that was all. I did not even really think about how this happened until we were home and I was answering another question about feeding a toddler.