I appreciate the insight and advice. To be more specific on the causeway it was a mile long strip of land with another 2 mile island at the end of it. We were on the Lee side of it in very light wind.I can usually spot the indications of a change in wind speed. But where we were it was tough. I probably answered my own question just now. We did have the engine running in the event the wind died completly, I am familiar with weather helm though on the smaller raqcing cats you have to guide them to weather to ease them off, they usually dont "head up" on their own, and can flip or pitchpole if overpowered, or sheeted in when a gust hits. I probably should have asked The question differently but I understand now.
I will definitely get the book you reccomended.