Re: Going to BVI! Bring cash?
Kind of depends on your plans for your charter. We grabbed a mooring every night and it was convenient to have cash on hand to pay the boat boy. If you'll be anchoring out then that won't matter. All the bars/restaurants/shops we visited took plastic but it was nice to have cash for tipping and in general it was a faster transaction. If you'll be cooking your own meals, not so much of a problem. We used cash often but still ended up taking too much with us. We tried to go lite on our first trip, but still overestimated what we needed for just about everything (clothes, food, booze, cash).
Check out TTOL for a good forum on chartering in the BVI.
You're going to have a blast!