How far is Isabella from Puerto Plata?

Hi. I would like to visit Isabella.

I willl probably (God willing) be taking Caribe Tours from Santo Domingo to get there.

1. Is there a stop that goes straight to Isabella?

2. If not, how far is Isabella from Puerto Plata?

3. Does anyone have the Caribe Tours website?

4. Is it pretty expensive?

5. Which is cheaper the metro or Caribe Tours?

Thanks