I have read in the past that Gary Burghoff requested to appear on M*A*S*H less often than weekly in his last 2 full seasons (6 & 7), and I know of a few episodes that do not include him, such as S6's "The M*A*S*H Olympics" (not having Radar allowed the other 6 regulars other than Potter split 3 on each team in Potter's competition) and S7's "Ain't Love Grand". Is there anyplace that has a list of which episodes do not include him? I have checked tv.com and did not find any trivia notes there about which episodes do not include him, so I was hoping that some M*A*S*H fan may know. Please reply if you know. Thank you!

I can answer my own question thanks to this webpage, which lists every character missing from every episode in which that character was a front-billed regular that season:

http://epguides.com/MASH/guide.shtml

Season 6:
"The Light That Failed"
"In Love and War"
"Change Day"
"The M*A*S*H Olympics"
"The Grim Reaper"
"Comrades in Arms (1 & 2)"
"The Smell of Music"
"Patent 4077"

Season 7:
"Major Ego"
"Dear Comrade"
"An Eye for a Tooth"
"Inga"
"C*A*V*E"
"Ain't Love Grand"