Hi, Jeremiah!
While there are no designated picnic areas within the theme parks,
you are welcome to bring in food, drinks, and snacks. Just a
few rules that Mickey Mouse has about bringing in refreshments:
-Only small, soft sided coolers
-No glass bottles or containers
-No alcoholic beverages
-You must stop at bag check for security to screen any bags you bring into the park, including those with food items
You are welcome to enjoy your snacks while relaxing on a bench, at a Quick Service location, or a nice shady spot that you might find. Remember that cups of ice water are complimentary at Quick Service locations, so you can lighten your load by not over packing water bottles.
Enjoy your picnic while visiting Walt Disney World!
Cathy