For the January marathon weekend? (not all events have all resorts as hosts)
I think each resort has its OWN bus, no sharing. And they pick up from a central location, so you're not going all over the resort. Makes it painful after the run, though, let me tell you! Wine&Dine last year, staying at SSR, bus dropping off nearish the pool area, and having to walk by that area, across the long long bridge, and then 3 buildings over...ow ow ow ow.