We stow 9 x 20 litre fuel containers plus the fuel tank for the outboard in the port lazarette...that pretty much fills it up. We always carry the extra 180 litres when passage making and when the main fuel tank runs down we transfer that extra fuel into the main tank....we've never HAD to use it on a passage but we carry it just in case. Cycling the fuel ensures freshness. 
Our 6-man Plastimo liferaft is mounted on the port aft rail, it's in a GRP container with a quick release (one pin) stainless tube mounting frame, which is padlockable for when in port...the padlock comes off when we head out. 

Cheers

Alan

Elyse SM437