Thank you for all the work you did. I had found all but the WWII draft registration. C.A.A. might have been the Civil Aviation Authority? Additional information from the WWI draft registration shows that he was farming on his homestead in Didsbury, Alberta Canada at the time. He seems to have missed the 1930 U.S. Census.
I'll contact the library to see if someone is available to look him up in the phone books.