The one gallon recommendation includes cooking , washing, hygiene (brushing teeth) etc. under adverse conditions.
How many of you actually DRINK 1 gallon of water a day
unless you are truly laboring in the sun ?
Our go bags have a liter of water each and a small water filtration system, good enough to last the 24-48 hrs of hurricane before returning home or going to BOL.
That should be plenty.
Our home has 5) 50 gallon barrels plus hot tub (350 gal), 2) 80 gallon hot water heaters plus whatever we could fill or have set up to fill during the storm and our BOL has an unlimited supply of potable water.
Of course I do agree with Mdotweber regarding the canned and bottled beverages.