Hi matt215,
The liveaboards dive NW Provo, West Caicos, and French Cay, same sites the day boats visit. Of course, you get 4 or 5 dives a day rather than 2 or 3.
My son and I spent a week on Provo in July and dived with an excellent operator, Caicos Adventures. We did 13 dives off West Caicos, did not make it to French Cay due to conditions. We saw one or more of the liveaboards most days.
The walls are generally quite deep, dive depth is your choice. Our average max depth was 99 feet (79-140 feet) with more dives less than 100 feet than over. Our mean average depth was 56 feet with an average total dive time of 64 minutes. We had warm water temps of 84-85 degrees F, I would imagine it will be a bit cooler in December. Visibility was not at its best during our visit but was quite good at around 70-80 feet, a bit better on a few occassions. There was very modest current on a couple dives, generally none. The diving was quite leisurely and relaxing with no unexpected challenges. We dived independently, most on the boat chose to go with 1 of the couple DMs in the water. I don't know how the Aggressor works, you probably have the same choices.
The reefs were very healthy and there was abundant sea life. For us, the sharks were a real treat and we saw several to many on most dives. This video is from the cut in the wall near the mooring at Boat Cove
YouTube - Old Shark and Big Shark
We had a fantastic time diving in T&C, I bet you will too. I'd love to get back there again.
Good diving, Craig
