Just when I thought I had the whole tree book as complete as I could get it, I was pecking around on Family Search and started looking at their updated trees. Low and behold, researchers who are better ferrets than I am had several records that I had not been able to dig up on my own. I found more than a few marriage dates and places, added a new person via a new marriage record that I had missed, and discovered the St. Louis Military Separation File, which proved to be most helpful.
If you want to see the whole megillah, I've uploaded my RootsMagic database as a public member tree to Ancestry.com. I've included all of my notes and sources for each person in the McKee tree.
Questions? Please comment or email me at firstname.lastname@example.org.