The passengers can drink IF they are of legal age and the boat is in a wet county. There are no open container laws as in automobiles. The operator is under the same alcohol laws as an automobile...
At least 4 passengers. The reason because you may not have more than four or you will get pulled over.
Well i am a driver of a commercial horse drawn carriage , and we are generally referred to a a carriage driver.
No.
The proper, traditional term is a "Coachman", which applies to the driver of any kind of horse drawn carriage.