I think it all depends on the nature of S That Hits the F. If there is a further economic collapse, I would see more government control of the economy, the government printing money, instituting wage and price controls, and rationing of various supplies. I'm thinking we'd see economic controls similar to those exercised during World War II and public works programs similar to those enacted during the great depression.
If something brought down the national government, I would see state, local governments, and even neighborhood associations picking up the slack, organizing people, printing their own money, etc. I see individuals surviving by using camping, gardening, and hunting as needed. The fundamentals that make America a great country are in the constitution and will live on as a thread in whatever comes next. I don't see a disaster suddenly transforming everyone into murderers, robbers, and zombies.
Unless a nuclear exchange or a sudden natural disaster renders my home dangerous and vehicles inoperable, I don't see myself suddenly getting a yen to hike the Appalachian trail with a pocket knife and a can of beef jerky. That being said, I do see being prepared to evacuate with a couple of weeks of supplies or being able to shelter in place for a few weeks or even being prepared to live like a third world poor subsistence farmer. However, I think people can be resilient as a community and get through an awful lot.