No way! You do NOT want the airlocks at the head of the ship! That falls squarely in the realm of (bleep)-ing into the wind...
Just as long as the airlocks are at the head of the ship!
(And just imagine the poor red-shirted guy whose job it is to go outside in a spacesuit and scrape all the airlock residue off the hull...)
Well, having it at the head of the ship would follow the Naval tradition.