La bella Marina would be the best person to answer, but a great place for DR info in general is: http://www.DR1.com
There's a message board where you can find the name of the bus company with the bettter seats and cleaner windows.
I was sniffing legal, business and real estate for a while (luckily, the impulse subsided) and these message boards are perfect for local information.
...if a cab from the airport in Puerto Plata to KB Hotel is $20.US - I'd sure hate to consider the cost of a cab from the otherside of the country!? You stuck with thses tickets? Fly into Puerto Plata if not.
Be polite and brush up on your Spanish. You'll be a guest in the DR and they respond well even to weak attempts as the previous writer indicated.
It's a helluva nice place to go. You'll have a wonderful time. Cheers.