The Travis/Macdonald relationship began at least as early as 1900. I recently found a Barre Evening Telegram item, dated August 8, 1900, that reported a fourball match, at Ekwanok CC, in which Travis and partner, C.C. Macdonald, of Chicago, lost to Ekwanok pro George Low and William H. Davis of Lakewood CC. And, wasn't Travis the one to whom Macdonald sent information about significant golf holes he found in the UK?
But, along the way, I think that Travis became something of a gadfly for the USGA with his criticisms of tournament formats, rules, etc. That could not have set well for Macdonald.
Your idea of creating a "My Opinion" for the GCA site is a great one.