Just a short PS...
Sailing and navigation there is simple. Most all hazards are visible, land is always in sight, and harbours are plentiful and not very far apart.
Only difference from your home waters is that the tradewinds, when they are blowing, are not gentle breezes. They can blow 15-25 knots, and kick up quite a chop in the Drake Channel. The anchorages can be very breezy and gusty.
Most anchorages these days have moorings (at a cost of $20-25 a night). In some, there isn't room to anchor, but in others you can anchor if you like.
The water is very clear. You can often see down to 30' or more. Reefs are very well marked on the charts and with nav aids. Buoyage is same as U.S. -- red right returning. Currency is U.S. dollars (they love 'em!). Unlike the old days, there are lots of good restaurants located around the islands, and you can find most anything you might need.
The BVI are much more laid back than the USVI...slower paced, and not nearly so much "development". You might call them an "underachiever" in this regard, and thank heavens they are! Overall, a delightful place that sailors return to again and again.
S/V Born Free