I just wanted to list a few problems with the first Trans Mississippi leaders in the April 1861 scenario.
1) Ben McCulloch should start in the Trans Mississippi not Richmond. He should also be more senior (preseance), either identical or slightly senior to Price. He should also have the cavalier rating. (Don't confuse him with his brother(s) also Confederate generals.
2) Stirling Price should be outranked by McCulloch above, they had a command conflict and while Price was a Major General of Militia it seems he was outranked by McCulloch's early Confederate Brigadier General rank.
3) Earl van Dorn. He should probably be a 2 star general as he was sent to the Trans Mississippi to solve the problems between McCulloch.
4) Pike should probably replace Stand Watie for the first year or so, while Pike was a totally ineffective General he played a major role in rallying the "Civilised Indians" for the Confederate cause. I don't think he ever commanded more then a brigade, but he certainly outranked Watie (I'm not sure whether he also had command of Cooper's brigade, which would essentially make him a division commander). On the other hand he certainly was outranked by all of the above.
5) Stand Watie should make a later appearance, I don't have the exact date of his first separate command, but by Pea Ridge he was still only commanding his own regiment.
6) I'm not sure there is any way for the Union to gain access to Indian Territory units. If so they should also get Drew, Watie's nemesis (in the military sense, politically there was yet another IT leader). Alternatively the Union might have had a different IT commander (Drew changed sides twice, from Union to Confederate (which explains his presence at Pea Ridge) and back again to the Union.
Note, Price probably should have far more Militia units when his command is first created, these probably also shouldn't be named after Slack or other regular CSA generals (Slack's brigade at Pea Ridge, again much later then the creation of Price's command, was one of two or three regular Missouri brigades).