Treehouse villa service is separate from regular bus service at SSR. You need to transfer onto this bus via the Springs bus stop. Given the size of the resort, and the fact that there are several stops within the resort, before you need to transfer to the treehouse section, you end up losing a lot of time riding buses. It's especially unnerving if you have ADRs you need to plan in advance for. You need to leave a minimum of an hour before your ADRs, or you just won't make it. I highly recommend getting a rental car if staying in the treehouse section. Even if its just to drive to another section and park, to be closer to the necessary bus stops. This is one of the reasons we no longer stay in this section. We have small children, and come back mid day for naps, etc. When we were a group of strictly adults, we would leave super early in the morning, and not return to our rooms until park closing, so the busing was never an issue.