I've been reviewing my FG trips (see what you started?), and a couple of things popped into my head. One thing is the importance of dive planning, and on the FG it's crucial. Obviously this isn't the drift diving you might be used to in Cozumel and other destinations. That boat is moored, and it isn't going anyplace (or shouldn't). If the captain says, "if you come up down current, we'll come and get you with the sailboat", I'd be thinking "thumb the dive--they don't know what they're doing out here". If they have a chase boat, that's a different matter.
In my opinion, the best dive plan out there is "stay in sight of the buckle for the first couple of dives"--as I've posted before, there's plenty to see. However, if one is just determined to venture off, the next best plan is 1/3 tank up-current, turn, hit the buckle again and ascend when down to 700-800 pounds. At least, that works for me--others will suggest ascending with more air, some less. My point is navigation out there can be tricky, and it's usually divers who travel out at right angles that get in trouble with finding the mooring line again. Subsequently, they are forced to come up on their own, and if the current's moving well, they will drift a LONG way during a safe ascent from that depth.
It's 90% in the planning. Know exactly what to expect, and if you have any questions of your dive partners, ASK!
Have fun, take care, and give us a report upon return.