As far as the fighting knives, the leather handle, sheath and hidden tang design are among a Ka Bar's weak points, as far as the fighting knives. You can get synthetic handles and sheaths, which does away with the possibility of wearing or rotting out the leather. Not sure if these are available for the Ka Bar camp knife.
The hidden tang design and the aforementioned guard are not strong points, but the knives seem to bend near the guard before breaking, and the guards also seem to bend more than break. I think the blade itself is pretty strong for the money, but the point at which the blades taper into a tang creates a weaker point. Of course this many only be exposed when you decide to really pound on the knife. Looking at the design of the camp knife, you probably face a similar situation, as it seems to be hidden tang and has a guard.
The smaller fighting knife with the 4 or so inch blade is probably better for most utility jobs. If I needed something that can take on bigger jobs, do lots of jobs -- just not any particularly well, save some money, get something that can really stand abuse, I'd buy the cheap Coldsteel kukri. If I added to that a Mora, and I'd have more jobs handled for less money than what any Ka Bar costs.
Of course, the reality is that I did not choose at all. I've got a Ka Bar, a Coldsteel kukri, and a few Mora's, as well as a number of other knives. I doubt I'm the only one here who is continually tempted to buy more knives.