We were in Disney this past May and booked thru Starline tours. They picked us up outside our hotel. After stopping to pick up others at other nearby hotels they stopped at their offices in Anaheim where you pay for your tour and then board the correct bus for whichever tour you have booked. Almost all the people on our bus were taking the same tour as us and we didn't need to change to a different bus as the same bus that picked us up happened to be the one being used for the tour we booked. You just need to call ahead of time and book with them so they know when and where to pick you up. At the end of the tour we returned to Anaheim and they dropped us back off at our hotel.