This like so many things depends on the type of collapse, the duration, and your location. Personally I believe staying out of sight and make your residence appear "raided" will help groups stroll on by your property without taking a second glance. Though, in reality if it's a long duration and you're in a populated area it'll be next to impossible to tend to a garden, animals, chores, etc. without being seen. This is where I feel the unprepared come in. The prepared members of a community harden their defenses while the others work the gardens, crops, feed animals, gather water, etc. You have to learn to be creative about setting up your defenses too.