Pardon my ignorance, but what are the MacDonald Papers?
I was hoping to find when and where they enlisted and any data that might provide clues to their service, battles, locations etc.
You are correct in citing that the United Empire Loyalist related websites are better than those of the American Patriots.
Tracing down very little information such as a date, location, unit names or leaders can lead to understanding our ancestors. A single battle referance lead me to discover a Lt Col ancestor's monument in upstate NY. I would never have thought to look there otherwise.
Another obscure referance to a death location, which I thought was in Maine, may well be near Plattsburg, NY. The date of intestate probate - April 29,1777, Maine. Did this ancestor die during the Northern Campaign in the Revolutionary War? Only time will tell.