We used drums, plastic and steel... And steel tanks to store fluids in when we scrapped and derbied... Old oil tanks for diesel heaters ect... We never stored them inside... But we had major fire risks... But a couple plastic drums full of gas would be not much different then the 4 fivers I got in the garage now... If it's going to go it's going to go... I just couldn't imagine dealing with the gas that many times to get the drums full in the garage unless you got a better way? Then fill the boat when you can pull up to the pump in one shabang... Now if you can get a 250 gallon tank and install a pump and get gas delivered then it'd be worth it just for convenience... But I know that'd be against your HOA... Two drums of gas in the garage probably is too actually... You should read in on that...