There is a basket with a cover (seals with velcro) on the front of the Segway itself. Both my DH and I were able to fit our backpacks into the baskets. I could also fit my small camera case in my basket as well. Our backpacks weren't full size though, so if you have something large and bulky you should probably have them store it in the training room. Once you leave the training area, you will remain on the Segway the entire time until you end the tour back at the training room. The only time you might be separated from your Segway is at the photo stop on the far side of the lake directly across from Spaceship Earth. If you choose to take any photos, you are required to get off the Segway. We just gave my camera to the CM and she took a photo for us; most people stayed on their Segways.
-Laura