Simple questions.
Is it a situation were others have formed into dangerous scavenging groups?
Is your current home likely to be a target for these scavengers?
Is your current home easily defensible over a long period of time?
If the answers are "yes, yes and no" it's time to go and you better hope you have a better place to go to. Being constantly mobile is a VERY bad idea for long term survival. You need a good sanctuary.
Nice litmus test!