Thanks everyone. Totally agree that St. Croix and the USVIs are easier out of St. Thomas. I started with the companies there (and still have some hope Island Yachts may work out), but availability is extremely limited for my dates. To share what I've learned so far about the BVI-based companies in case it is helpful to anyone else in the future, both Moorings and Sunsail allow sailing to all the USVIs (including St. Croix), but not the SVIs. Horizon is the opposite, they allow sailing to the SVIs but not St. Croix. I was surprised by Horizon's position, since it seems to me that Tortola to St. Croix is an easier trip than Tortola to the SVIs (especially on the way back). I suppose the SVI trip is less open water and doesn't need to be a direct shot since you can stop in St. John and St. Thomas on the way.
Happy Thanksgiving to all (except Capn_mark and Warren, for whom I'm about 6 weeks late).
Regards,
Matt