Planning a trip there this summer myself. Not a lot of info. about Andros in the blogs, or so I'm finding out.
Suggest you pick up a 2009 copy of Steve Pavlidis' "Northern Bahamas Cruising Guide". Mine arrived the other day and it has in-depth info. about the 5th largest island in the Caribbean. I ordered mine from the publisher, Seaworthy Publications, firstname.lastname@example.org
. Cost around $60.
As far as clearing in at Andros, rather than Nassau, you'll probably want to use Morgans Bluff. Have read good reports on the SSCA website from cruisers who stop there routinely.
Good luck and have fun!