M_Boats: Cruising San Juans and Gulf Islands

Just getting ready to do some cruising around the San Juans and Gulf Islands for the next couple of weeks and contemplating how much fuel to carry for my 6 hp four stroke engine. Not sure how much a little engine pushing a little boat (M17) would consume, if the winds are not agreeable. David Scobie, how much fuel do you usually carry on your travels?