DW
We have been to Disney World many times when our kids were younger.
We always packed sandwiches, snacks and brought them in either in fanny packs or a bag (like a diaper bag). We stayed both in the park and outside the park. If you stay in the park, the Contemporary is nice as the rooms are somewhat larger. We also enjoyed Fort Wilderness Campgrounds which have glorified trailer homes with kitchens. On International boulevard, Embassy Suites is nice, and next door to Friendly's restaurants which the kids love (free ice cream). Lots to do on Int. Blvd. Driving and parking at DW is actually easy and they have trams that take you to the front gate.
For lunch, we would always go to an escalator next to Space Mountain, which takes you to a slow moving ride which is covered. A great place to sit and rest and eat lunch. No one ever rides it as it is not really a ride but more like a tram that goes into Space Mountain.
Bottom Line: this vacation is not restful and not inexpensive, but the kids love it. I'll never forget my oldest daughter tearing up and telling us that she wanted to move there, on the day we had to leave that first time.