Our center console. On our last two trips to the Bahamas, all I kept thinking was how much fun it would be to have brought our 211 Mako to extend our exploration/fun range from anchor. The logs from both trips are peppered with advice to myself to bring it next trip (my wife talked me out of bringing it on our last cruise over, a sore subject the entire time!).
We took an 11 foot Whaler (first time with a 25 HP and second with a ten horsepower. With the 25 it went like a bat out of hell, but was a wet boat. With the 10 HP, with both of us in it, and all of our normal ashore gear, it struggled, and usually lost, trying to get us up on plane (with me alone in it, no problem).
When you decide to tow a boat across the Gulf Stream, you should have also made the decision to wait for a better than normal weather crossing window than you might otherwise need.
The only other problem with doing that is being on a ten day departure schedule is there is also the preparations and gear needed to safely tow a boat, which you can find discussed ad nauseum on the forum.
Oh, and a view bucket. It's usually a five gallon bucket with a plexi-glass bottom. It provides awesome views of reefs and fish without having to snorkel up and go over the side (nice for checking the anchor set as well).
An easy way to keep up with things and listen to the music you like. We have a docking station on Hobo and in a car back in JAX. We just move the control back and forth on one subscription to Sirius radio. 
