markf--"McPhersons" is in the DT, I'll put lyrics to the others in new threads. Do you need tunes? I am not great with abc, but I can try, think I've got the rudiments.....
Ma-K--I am both a fiddler and MD'er. I play MD trad style, with a noter and strum. I TRY to tune to a "real" key, ie. D or G, but someimes it isn't possible. When I play melody on the MD, I expect the fiddles/guitars to find my key. Instead of telling them I'm in D or whatever, I just give them the Tonic fret (3rd in Ionian, etc.) and let them decide. The other fiddler often follows me on the melody very softly or muted.
I have also played with MD players who play with the group using left hand finger chords and right hand strum. I can't do this but I have the mode/key tab progressions if you want them.