If my math is correct i carry #14 of propane. 3.6 gal between two tanks. (But i’ve had a glass or three)..that would last the whole summer and if i had to refill, one tank is not heavy assuming a walk to a gas station. Notice singular tank. The one pounders, for me would not work. I would have to buy more or refill more often and deal with numerous “tanks”with possible disposable issues. But, my sailing takes me into some remote areas of the PNW. Two yrs ago, 2.5 gal plus a skoch more took us into the Broughtons and back for two months. So, it all depends on the sailing you do and where you go. Oh ya propane is for cooking only. Not gourmet meals but good ones..a little baking. So, I guess what I’m saying is outfit the boat for what your sailing practices are and availability of propane.