I'm sure others may have better suggestions than I, but if the infrastructure/utilities are down for that long, my only suggested option would be to have a bug out location owned by yourself, friends or family in a rural area or small town/community that can band together to better provide those services.
Your larger cities and dense metropolitan areas by that time will likely be under tight control by military in order to prevent anarchy, or it will be like living in downtown Manhatten in the 1981 movie, Escape From New York. I say that slightly tongue in cheek, but really all one has to do is to reflect back on what happened in New Orleans in a scant 24-48 hours after Hurricane Katrina hit back in 2005, then imagine what it would have been like if those initial conditions continued for 6 months. Civilization really does possess only a very thin veneer.
I believe for the majority of people, that just isn’t feasible for reasons of money, location, limited transportation choices, stuff like that. It seems it would be really difficult to transport all the material required to live off the land, if there is limited or no fuel available to move. Things like tools, storage containers, etc, are heavy and take up a lot of space.