I finally got it. 4073 on normal. Brought just one brigade down from the hill and ended up only barely engaging it with a regiment or two, I had it sitting in reserve on my right flank and never really needed it. And right on about the arty Little Powell, pretty horrible stuff that canister is up close. The men who stood in the face of that had to be hard in places I don't even have places.
As frustrated as I became with this scenario, one thing about this game really shone through - the random nature of the enemy each time you play the scenario. I don't do Saves, so each restart is an unknown quantity.
I read through the manual again, and "discovered" NumPad 0 to TC all units subordinate to the selected commander. Amazing what you can learn from documentation.
And thanks a bunch, X Navy Seal, for doubting me on the East Cav Fields, now I know what I've been saving my PTO for, lol. Beat one already, the Wolverine one, man that was fun, tearing up and down the field with all that cavalry. Came very close on Custer's First Stand (thought I had it licked, took a knee to run out the clock and then this Mongol horde comes screaming down the hill at me in a wave that actually spooked me) and have all but declared two others as immpossible. Knowing they are not impossible only forces me to dig deeper, and realize over and again how much depth there is in this "game" and how little I know. The distance between my ability now and General of the Armies is vast.
Cheap at twice the price.
Thanks for your help guys.