No direct buses run between the resorts. To do it with a bus to a mid point on the way and continue with another bus does not make sense. The distance between the resorts is roughly 130 km. one way =1,5 hours of driving.
Regarding taxis = best is to hire on a daily basis. How much? Difficult to assess. You have to arrange it locally.
Check you don't need something else than your driving licence. I seem to remember in the dim and distant past there was a thread saying you also needed to take a ???