Jerry, if I remember correctly, RichW has a bit of experience with camp boxes. He should be along any time now and I bet he has some ideas too.
Like MM mentioned, I went totally overboard with my "camp boxes" a few years back and once packed, they were simply too heavy to be practical.
I like a box that is large enough, heavy enough, and stout enough to sit or stand on, yet light enough to be moved around without getting a hernia.
And, simple as that may seem, it can be hard to do if you don't select your wood and design properly.
Uncle Russ...