Before I get to your questions there is a great deal of information at the resort's website
www.plantationbeachresort.com and unlike this reply it includes pictures.
There is shore diving but it is basically small rocky reefs and coral heads, however the macro life is exceptional if you take your time. Off the dock I have seen electric rays, batfish, toadfish, sharpstail eels, octopus, decorator crabs and sailfin blennies. Not all in the same dive but if you take your time you will see alot of neat stuff off the dock, around the seawall and around the house reef. The night diving off the dock is excellent, at least once a week if there is enough interest they will run a night dive off the boat but most guest choose to go off the dock, as I said before you never know what critters you are going to find.
I know the dive operation is a PADI facility and they offer a number of courses and specialties. The dive ops is a full service operation and if you choose, you will not have to touch your gear until its time to pack. Danny the mate on the boat makes sure you always have a full cylinder and are ready to go. At the end of each day he washes the gear, the next morning it's on your first tank of the day. Roger, the boat captain and instructor is PADI certified and Coast Guard licsensed. Roger has been down there since 1994 and has exceptional local knowledge.
The dive boat, "The Melissa", is a bit older but very well maintained and very roomy. It can easily take more than 20 diver however 20 is the max for the resort so you wil never feel crowded. Except for trip to the "Banks" most of the dive sites are within 10 minutes of the resort, its very comfortable diving.
The maximum number of divers the resort can accomodate is 20 however it is seldom that full. That typically only happens when a large group come down, when I am scheduling a trip that is one of the first questions I ask to make sure I avoid those times. Most of the time I think the resort has less than half that number of guests.
No, they do not have nitrox and I have never inspected their compressors so I cannot really comment. Finally, I have never been there in November so I cannot really comment on the weather either. If you are really interested in visiting the resort I suggest you drop an email to Roger at
pbr@laceiba.com, he is very nice guy and can help you with some of these questions.
Hope this helps, let me know if you need more info.
James
www.jamesdaleyphotography.com