As others have said, there's no guarantee that any of the Scrap Yards you mentioned will be available. As a matter of fact, none of them were at the last Knob Creek. However, they did have Son of Dogfathers, some Scrapper 5 SEs (in INFI), and I saw 3 BDLEs (I got one after someone snatched the other two out of Garth's hand). I suspect that whatever is left over from military runs is set aside for the next show, although BDLEs wouldn't fall into that category.

I'm not saying they won't have what you're looking for (because I don't know any more than anyone else about what they'll have), but am just suggesting that you go with an open mind and be ready to strike at of targets of opportunity. Oh, and if you're in the initial rush and you aren't sure if you want something or not, hold it in your hand while you decide because somebody else will grab it if you don't. Things calm down later in the day, but it's a feeding frenzy when the opening bell sounds.