Thanks. I did consider what would need to be done if this had been a real situation, and it brought some very interesting things to mind, especially with regards to food. I think the need to horde whatever you found into one location you could guard would be natural, but the reality would be that doing so would not be safe. Having food stored multiple places would secure you against losing it all at once should you also lose control of the storage place. I decided on the character of Jack in the role of 'wise old head', because even though a young man himself, he was older than the kids and had the experience of fighting zombies in the city. Jack is kind of a cheat, really, a way to have the kids already a little 'zombie smart' as the story begins.
I think most of us know or have known at least one person in our lives that seems almost over-endowed with common sense and clear thinking. That's Jack.
He decided to fortify the town store and leave the bulk of the food there, and only bring back enough to the camp to have on hand as a back up. The risk is losing the store in town to roving survivors, but that would be something they would spot on approach to the town, and serve as a warning. And if they somehow lost control of the camp, they would still have the food in town.
And, for real, Jack really didn't worry too much about a lot of other survivors. From what he had already seen before he'd arrived with Mom from the city, he just didn't think there would be all that many survivors to contend with.