Bryan,
Good time to go.I went last July. HOOOOOOOOOTTTTTTTTTT. Then the refrigeration went. NO COLD ANYTHING. AND NO WHERE TO BUY IT!It is a great trip if you are prepared and nothing goes wrong.The previous advise about charts is a good one. THERE IS NO PLACE TO BUY FOOD, WATER, BEER, FUEL, OR WATER! Did I say Beer. Key West was happy to get our money when we got back.If you want it, take it with you!Becareful of the anchorages. If you anchor near the Fort, there is a channel that is 30' deep. The surrounding reef is about 7' to nothing. If you lob an anchor on the 7' deep section, and you drag, your proper scope at 7' will not be enough at 30', you will run aground 180 degrees from the on coming wind by morning. On my July trip, I was not captian so I laid awake at night until we went aground. This happened 2 of 3 nights we spent at the fort. I would look into the anchorage just south of the fort. It is a little shallower and the holding is better ( this is hearsay, we did not stay there but I read an article about it). I just know that to the east of the fort you may not sleep well. It is illegal for the fisherman to sell things in the Park. If you approach them when the park rangers are not around and barter beer, you can get some pretty good stuff. Don't forget to give the rangers a cold coke, they are nice guys and don't get much social life out there. They will be by in late afternoon just to see who is there.Don't forget to drag a "dolphin smasher"( a lure with blue, green, or pink body with a clear skirt with shiny silver spots in it) behind the boat from Key West to the fort. We were pulling in fish every 20 minutes on our trip. We had some great fish dinners.Have Fun,r.w.landau