I did RTI a 100 mile race which starts in Fort Walton Beach, Florida several years ago on an F17 solo. You do think about the fact that you are solo when you get on that offshore downwind tack trapped out with the spinnaker up. After several of those long tacks while bouncing off the wave tops, I decided it might be better to just sail a lower course and stay aboard the boat. I would recommend that you sail a distance race of this length on a two man boat.

Tom