I've been grinding a few bigger knives here again, and have to admit that one of my problems is that after so many 4" hunters, a 9-10" camp knife just looks HUGE to me ;-) One with a 12" blade...
Unless everything you are chopping is 3-4" thick or more, I'd still lean to a bit smaller, lighter knife. As Sal said the Moran and Hendrickson styles are very good. One reason is that their blade and edge geometry cuts so much better than most factory knives that are bigger and heavier. I imagine Wayne is thinning out and putting a convex edge on the trailmaster's and kukri's?
That 1/4 x 2" stock I think would work fine. I went to some 3/16 x 1 1/2" stock for a D-2 fighter, but its so light that it would not make a good chopping tool.
I'd go with a flat or slight convex grind from the spine to the edge of the blade and a fairly thin convex edge. A bit of a recurve to the edge at the rear of the blade would put a little more meat forward and a bit lower. With that much length a slight taper from the handle to the point should work good too.
I put a bit of a swell in the middle of the grip, similar, but not as exagerated as that on a Busse on my big knives, along with a hook at the end of the pommel. Like I think I said before in another post, with some practice, you can just grasp the front of the handle of the knife with thumb and forefinger, and leave the other fingers loose so you can draw the blade back at an angle by twisting your wrist up, then snapping the blade down and closing the other fingers at the same time without having to use a big chopping motion with the arm. Using the knife's speed and momentum, and a blade with a thin profile will outcut a lot of bigger, heavier knives.
just my two cents
madpoet