Ok this is getting increasingly interesting to me now that you mentioned the Big Buffalo stocking. I personally knew a person that was involved in that project, he has since passed away and I never knew that they were Redbands....just assumed they were "just rainbows", and I'm not so sure that he even knew exactly what they were or where they came from originally (he didn't even fish, ever).... but all of this ties in together because he worked at the Neosho hatchery before taking charge of the fish breeding at Troutdale ranch. Your info (excellent by the way) shows that the Meramec and Big Buffalo were the only "study areas" but I know (almost 100% certain) that a little spring creek known as Alcorn hollow in Camden county and the fenced-in Spring branch in Gravois mills also recieved fish from that very same batch that was put into Big Buffalo. Whether those were considered "study areas" or not I can't say, but I remember when that was going on.
I guess what this boils down to is that undisclosed, or unrecorded stockings have and do take place. There are trout in HaHaTonka spring that nobody seems to know anything about also....supposedly no recorded stockings since the castle burnt down.