I would also brush up on my navigation skills. With the exception of Stetson Bank - the East and West Banks reef structure look very similar. Its all low lying corals of various types. It is really a good thing to be able to navigate out and back to catch the mooring line. Otherwise if you drift off in a current the likelihood of finning back is tough. Then you get to ride the boat of shame when they have to come and pick you up.
And +1 for aquabill - the staff of the Fling is fantastic. BUT, if you break their rules you will not be allowed back in the water. They check you time/depth and consumption after every dive. If you break their deep limit - you are out. If the current is blowing at a site then they move elsewhere. It is great trip - you never know what you will see in the open ocean but yes....it really calls for a solid bit of experience. Dive safe!!!