You know, I doubt I'd see many 'farm' type accidents, because the morons who are too stupid to use tools right are not going to be in a position to use them.
People who have worked on this problem look at it like this. First year to year and a half, 50% death rate. Next 2-3 years out, another 50%, after which we have a manageable and (for the sake of this discussion) usable population. The managers, the administrators, the junkies, and ex-junkies, the "educators", the drunks, and all the other people who depend on other people to work to make them survive - they are all dead, and pretty quick at that, first winter for sure.
So, what we have left are biker gangs (who are already highly organized, who would kill you and not care, if not like it, and who tend to be highly skilled with their hands, though the 'organization' deal is really supreme), the people who saw this coming and organized ahead of time right down to planning the community, and the Amish. Pretty much, if you are not gathering your tribe around you now, if you don't know where you are going to go, and who you are going to meet there, and who is going to do what - then you're dead before we even begin this adventure.