I would definitely get a stroller as wheelchair tag. You may not always need it but lines can get long holding a two year old and it will give you some flexibility if needed. You may also want to scope out the location of the baby centers at each park. We found them helpful for our son on our last trip who has some sensory issues. They were a good, quiet location to decompress as well as better equipped for bigger kids who need diaper changes or medications taken.