Is 4 days enough for a BVI yacht charter?

Yes, 4 days is enough for a BVI yacht charter, because the islands sit only a few miles apart. Cooper Island is about 4 nautical miles from the East Tortola bases, The Baths on Virgin Gorda about 11, and Jost Van Dyke roughly 14. Short hops. A proven 4-day loop: Cooper Island the first night, Virgin Gorda and The Baths on day two, Jost Van Dyke and the Soggy Dollar Bar on day three, then an easy reach back to base. Leave Anegada for a longer trip; its reef approach eats half a day each way. A crewed charter squeezes the most from a compressed schedule, since the captain handles every passage while guests swim. See the full week version in this 7-day BVI island-hopping itinerary.