Well, I had a boat down in the BVI for four seasons ending last year, and before that I chartered for about 10 years from the Moorings. This year I did one charter
with the Moorings and one with Horizon. There are few anchorages you can go to where you won't have a number of boats in there with you. One of the issues is the fact that the Moorings actually "red zones" a number of the anchorages that are secluded or quiet because they require local knowledge or some skill to get into. Generally, if you go into any prohibited anchorages, you will be violating the terms of your charter and have no insurance
going in, staying, or getting out. That said, Benures bay is a relatively quiet spot to anchor. There are also a few spots where very few mooring balls are located and won't be crowed at night for that reason. For instance, there are a very few balls in Norman Island that are overnight in the area of the caves. As you enter the Bight at Norman Island, there are a few balls on your port side before you actually get in the bight that permit
only five or so boats to be in the area. There is also an anchorage with Mooring balls on the NE side of the Bight which I think is called soldiers bay that only had three balls in it.
If you go over to Yost Van Dyke, Diamond Cay where Foxys Taboo is located is a small anchorage with mooring balls that won't feel crowded, and little harbor between Great Harbor JVD and Diamond Cay often is not nearly full. Seems like JVD is not as crowded on Wednesday or Tuesday as it gets on a weekend due to the way the usual circuit for bareboaters works.
If you want peace and quiet, stay away from mooring anywhere close to Willy T or Pirates in the Bight, and for a similar reason, best to moor as far away as possible from Saba
Rock Restaurant or the BEYC because they often have loud night time entertainment.
I might mention that Key bay over on the Norman island side of Peter island can be a good spot to hook, and I don't think it is prohbited. Generally, you put Pelican Island over at Norman at your stern and steer about 70 degrees to get to Key bay. As you go in keep a good eye out for a reef that extends on your port side about 2/3 across, and for the rocks that are on Starboard. After you get in there is room only for about one other boat, so it can be on the quiet side.
I have anchored behind Saba
Rock in Eustacious Bay before, and over on the biras creek side, but I don't think charter boats are allowed in there. Both are quiet but you have to meander through some coral
reefs to get to them. Savannah Bay can also be a good spot to anchor, but again, I don't remember if charter boats are allowed in there. When I was in Savannah Bay it was in a catamaran
, so I can't remember what the water
depths were going in.
Basically, most of the nice anchorages charter boats are permitted to visit are going to have other boats in them, but you should be able to find enough good spots you need not be annoyed by the presence of others. Good luck.