Ted, I sorta like #4 or #5, the top one appeals to me "IF" I've got to do the etching - it's simpler with fewer lines to mess up. A good electro etch will do amazing details, the more "fine" details, the more chance of a messed up etch. Hey, now you've got your own stencil stuff, you can try them all and see how they etch. Maybe that StencilPro stuff will really work good. Practice on scrap metal until you're getting good results.
Now, one more thing - since this is a "traveling billboard" perhaps rather than having "Made in Montana", you could consider "city, Montana"? That would make it a good bit easier for somebody who had no idea who or where you were to find you and order a custom knife. I just did a search for "hauser knife" and found a couple, but none where you. I also searched for "hauser knife, Montana" and still didn't find you.
Perhaps rather than "city, Montana", your website address would be good? You WANT folks to be able to use the logo on the knife to find you.
Yea, I know - I get a bit long winded sometimes {g}