Get the CBP ROAM app and set up as much as possible before you go.

Your boat... can generally list yourself as "captain" and others as "crew" on BVI form. Confirm you have all your USCG forms (I carry all of mine as PDF on phone/ipad) but also in our "boat book" . Same with National Park permit, etc. In BVI, Captain can check all in/out (Just carry all passports). In USVI, hopefully all cleared in with ROAM, but if you need to present all to customs, ALL must go. Also, in USVI waters, park police are will enforce overcrowding dingy as well as life preservers in dingy.

Returning to BVI, JVD or West End.... but do not cross over into BVI waters before Customs and Immigrations open, otherwise you may be hit with "overtime" fee (Even though by time you get there, they were open).

Especially in BVI, "Good morning/afternoon" is first thing you say. Remove hat and sunglasses, "please' and Thank you" , or they can make it difficult for you.

Not a difficult process, but a little intimidating at first.