I was thinking the same thing. If you need to provide all that equipment on your own, it sounds like going to a shelter is useless, and actually with the associated personal security risks even more counterproductive. If you have to have your own food, water, personal hygene supplies, bedding, entertainment, it seems like the only thing a public shelter can supply is literally shelter. If you can rig a cozy shelter for your family, I'd skip the evac shelter altogether.