Crap! I've been doing a bad job of checking the boards, and now I am too late. But yes, John, someone on the board has fished TRL and Taneycomo. Someone on the board even lived on TRL throughout high school, in Kimberling City, and if you haven't guessed it by now, that someone is me!
(Coincidence: while you were in my old stomping grounds I was passing by your current stomping grounds on my way to San Diego).
I'm afraid I wouldn't have been a lot of help in any case. I wasn't fishing during most my life in MO, and I only started fly fishing in my last two years there. As Jimbo noted, TRL is a terrific bass fishery, but you would have had a hard time realizing that this time of year, especially if trying to fly fish.
I fished Taneycomo a number of times before moving without much success. Recently, however, someone caught a 20 pound rainbow:
http://www.news-leader.com/article/20131128/LIFE06/311280027/.
Had I checked the boards in time, I might have actually steered you toward Crane, about 30 miles north of Kimberling City, to fish Crane Creek. It's a small creek but it holds some nice size fish and it has a fascinating history that connects to CA. McClouds were introduced there near the turn of the 20th Century by railroad workers. Though it's a matter of some controversy whether or not it is a pure strain of McCloud that still reside there, locals still claim they are. In any case, they're awesome looking fish regardless. It's one of my favorite places. (I have some pics of it in the Introduce Yourself section of the forum).
I'll be going back to MO for the holidays. I plan on fishing the North Fork of the White and doing some cold weather camping with my friends (probably would have been too much a jaunt for you, but IMO it is the best fly fishing in the state). I'd like to make it to Crane too if the fish aren't spawning, but we'll see if time permits. I'm glad to hear you thought the lake and surrounding areas were beautiful. I miss it tremendously.