The plan is to enter bank north of 17:10 N by the charts water depth is not a problem there and night arrival on the bank is okay. Clearing in at Spanish Cay is option as well.
If weather permits, suggest entering the Little Bahamas Banks long before sundown and head to either Mangrove Cay or on to Great Sale Cay for anchoring, sleep and rest, then on to Spanish Cay, etc. Walkers Cay is well off the 'beaten path'.
Better is to leave FL
well before dawn ... or in the late evening, arriving at the entrances to the banks (Memory Rock) well after dawn ... then onwards to further east. Dont enter the 'banks' in bad or NO light - its all 'visual' and there are NO 'markers', just waypoints and your depthsounder. Time your boats depth with the tides on the 'banks' - see Bahamas tides:
http://www.barometerbob.com
Use EXPLORER charts for the Abacos or a Garmin Chartplotter thats already loaded with EXPLORER charts. ONLY Explorer charts !!!!!!!
Old Bahama Bay Marina at West End is a fairly good place to land and to settle entry issues, also a good 'contingency' harbor if you 'need one in a hurry' -- narrow entrance blasted through rock and coral and which can get 'exciting' in bad weather from the N/NW/W.