The public busses are smaller than a school bus, bigger than a van. They cost around $1 -$2 each way (it may have gone up, I haven't been there in a couple of years). Just tell the driver you are going to Cable Beach and they'll get you on the right bus. It is quick and easy and a nice way to see a bit of island life. When you are ready to leave, just go out to the sidewalk in front of the hotel. All the busses going by go right back to Bay St near the dock. Have a great time!