Cost for a 27' Compac will be $150 not $300.
Lots of good advice above but I haven't seen mentioned the way we cross over so I'll add it.
Stage in West Palm Beach just south of the lake worth
Leave at night...around 9pm would be fine for a 27 footer. The inlet is wide and safe and well lit. Set your waypoint for the Memory Rock waypoint and you will arrive on the Bahama Banks in Daylight where you can push on to Great Sale
Cay and arrive in mid afternoon and anchor
. No worries about depths, and no need to check in and pay the dock
rates at Old Bahama Bay or cope with the no-see-ums.
Next day...leave Great Sale
to Spanish Cay or Green Turtle Cay for customs
check in and you are IN the Abacos.
Good luck it is a WONDERFUL place!