Here you go guys, this is what I found relevant from 1976 through 1986 issues of NKCA Magazine. Note, this was originally called National Knife Collector and Dealer Association Newsletter, then called Knife Collector Magazine, then called National Knife Collector Magazine, and finally called NKCA Magazine. And in mid 1997, all rights were sold to and absorbed into Knife World Publication.
I'll continue to go through the issues from 1987 through 1997 and see what else I can find. That's only 132 more magazines to look through!
Also good to note, that Bob was mentioned in probably 1/2 of the issues I looked through. But many were just statements like "I met with Bob and we spoke about ..." but it was nothing relevant to his Cargill or Cripple Creek knives. He also won a lot of display competitions, or was awarding trophies to others for their Cripple Creek collections at knife shows. But the knives were never shown, so I didn't bother scanning any of them in. Here is what I found useful for this thread.
First an image of Bob with his Case knife repair station set up at a knife show in 1976.
Next is an ad for orders for a custom knife that Bob made in 1977.

Next is an ad in 1978 for an Oak Leaf custom knife.
Next is an article from 1978, showing that Bob won an award at a knife show for a set of knives that he made. I wish the image was better so we could see the knives.
Next is an ad for his Seminole knife in 1980.
Next is the ad for the 1st Knife World knife in 1981.
Next is an ad for the Wounded Knee Barlows in 1982.
Next is an ad for his Dog Leg Trapper in 1985.
Next, a cool one. This is his "Cowbelly" knife, 1 of 1, given to the winner of a contest in 1985. Blade is etched "Proto" and has the NKCA shield inlay.
And finally, his nomination to run for NKCA president. Note, he didn't win this year, but he did win a few years later.
I'll keep digging and post more when I find it.