The concept of a BOB means different things to different people. For some, it is more of a get-home (GHB) role, in which case it might mean starting out someplace where you can't have weapons visible on your person, such as for the purpose of getting home from work in an emergency. Personally, I absolutely can't carry a firearm at work and presumably can't open-carry a large fixed blade, so anything larger than an EDC folder is stowed in my GHB, which is locked either in my vehicle or a file cabinet. However, I take GotThemKnives' intent to be a traditional BOB, regardless of where he's bugging out to. That being the case, distributing the weight/bulk between bag and on-person carry is a good starting point.
The rest tends to become more philosophical in nature. There are forums dedicated entirely to that sort of thing, and a lot of users on said forums put knives very low on the list of essential equipment. People have obviously survived a lot worse conditions than most of us can imagine, with a lot fewer resources available to them, so one modestly priced knife of decent quality could probably cover most requirements.
