Try a non-pressurized one.
Don't get me wrong I use and prefer propane but having used both pressurized and non pressurized alcohol stoves I much rather have the latter. I had an ORIGO 3000 which is a two burner stove. It utilizes fuel canisters which are filled with a cotton like material which absorbs the fuel releasing vapors into the fluke which are ignited for cooking. There is no fuel spilage and it is very reliable. The safety of a stove depends on the operator knowing its fuel and the equipment rather than in the type of stove.Alcohol is lighter than air so vapors will dissipate in an open cabin on the other hand propane is heavier than air and flows much like water to the cabin sole and bilge. The largest danger with alcohol is fire while the largest danger with propane is an explosion. Alcohol flames cannot be seen but a fire can be put out by water.Propane camping stoves are designed to be used outdoors. They lack some basic safety features like thermocouples, pressure switch, and push to turn controls to stop and help prevent accidental leaks and flareups. A good 2 burner marine grade stove with the safety features an quality burners will cost a few hundred dollars. The addition of a propane tank storage safety locker, electric solenoid, pressure valve and lines will easily push the installation over $1,000. I had a boat in which I installed a good quality PRIMUS stove connected by a five foot low pressure hose to a regulator, a pressure switch and an adapter to be able to use the 1 pound propane canisters. I had it set up inside the cabin and would hook up a bottle to cook and then take the bottle off as soon as I was done. The pressure switch and the thermocuple switch on the stove would shut off flow in case of a leak or if the burner went out. It was not a perfect installation but I felt it was safe enough and only costed like $250.We also have a trailerable and still use a Kenyon, single burner butane stove with it. We had one flare up as apparently the gas canister had not seated well but other than that we have had a good experience with it. But overall my choice other than a full fledge Propane installation would be the non-pressurized Origo, it offers a good degree of safety, reliability and ease of operation.