We use a double stroller.
It's a parade seat, nap spot, safe spot for rope drop/park close, lets us speed up if they are dragging and allows us to tour the world showcase. We also use it for drinks and snacks. You are pushing an object with a huge basket, so put in a case of juice boxes and snacks and suddenly your kids don't risk heat stroke and dehydration if you don't stop for a drink every hour. Just don't pack anything in it that you would be mad if somebody stole. Nobody has looted our stroller, but it can happen.
Also know that if your kids fall asleep in it and it's table service meal time, ALWAYS ask if you can bring in the stroller with the sleeping little one before assuming you can't. They can and will say no to you some days, but mine are so much happier when their nap includes A/C.