The TS shuttle is right next door, IMO it's nothing like walking to the parks, it's much much closer. We did this with no problems at all and we had a party of 11. We simply walked to the lot and then to the shuttle loading area and boarded up, they do not ask for proof of anything so if you wanted to take it to get to DTD that would work as well. Prior to doing this we asked the CM's at the lot and they told me that they had absolutely no problems with people walking in and riding the shuttles.