Failing to fill your water containers is a common mistake with water storage. It doesn't do any good to collect containers only to leave them empty. My parents had a 55-gallon barrel that sat empty in our garage for almost two decades. Just recently, I talked them into filling it up. It isn't hard, it just takes some time. Remember, if your water is already chlorinated when you fill your containers, you don't need to add anything to the water.
Tomorrow is a Saturday. It would be a great day to fill those water containers. You could get it done between conference sessions. Make it a priority. Plan on an hour to fill a family's worth of water.