I just returned from my 2 week BVI sailing trip (my first time in BVI) and my impression is:
Anegada is definitely worth the visit, so are the bats, and we saw the whales (mother and a baby) just south of Great Tobago island.
Some good suggestions here:
I preferred to anchor (and left the mooring balls fight for others)
All distances are so close that you can travel any place you want on any day. It is much easier then I anticipated.
Most important: Listen to Zanshin, Cam and other sailneters. They know what they are talking about.