LPG
i wrote a d-i-y article for boating magazine recently on installing an LPG system specifically for a cabin heater. if you are interested in the text of the article, which would work for your installation, send me an e-mail at joef@vdot.net and i will send it to you. two things - first of all, it's expensive and second of all, you should be extremely careful and patient with the installation. other than that, from what i've been told, gas cooks cleaner and faster and most people are happy with this fuel.