I've cleared out through Gun Creek the past two times - they are more efficient, friendlier and quicker than going through Spanish Town. Just anchor
close to the building in 20 feet or less with good holding (don't anchor
right in front of the dock
since there is significant small boat/ferry traffic, but to your starboard as you look at the dock). They close from 12:30 - 13:30 and don't have a credit card machine (although exiting only costs a couple of dollars and entry can be a bit more) so bring cash.
I like doing night passages, so I'll depart around midnight and hope for a mere 14-18 hour passage. Waiting for the right weather can take ages, so one must reconcile oneself to motorsailing and just dealing with the uncomfortable passage.
I came across last week, and the first half of the trip was perfect; after passing between Neckar and Prickly Pear/VG I set course for St. Martin and was pleasantly surprised to see that I could head
straight for it; the wind gods were on my side. But then the wind veered and the waves picked up and I ended up bashing uphill for about 35 miles and had to turn on the engine
in order to sail closer to the wind and reduce time and distance.
This motorsailing is typical for the passage, I can't recall
how many times I've done that trip now and it has never been a comfortable one from the USVI/BVI to St. Martin. Coming back is a different story.