Are you familiar with amateur radio? That allows communication at a distance without a centralized authority. You could probably learn to operate a radio and ha

Are you familiar with amateur radio? That allows communication at a distance without a centralized authority. You could probably learn to operate a radio and have it up and running by November. To answer your question though, I think you need to know your goals. Do you want to send messages to let people know how you're doing? Organize a resistance? What goal do you want to achieve? That will help you determine how to prepare.