After having watched RotJ ump-teen cagillion times I never noticed this scene in RotJ... Til last November. I saw it and I was amazed and I asked a friend of mine who said he too has seen this. In the scene when C3PO is flying around on that make-shift throne there's a scene which shows the camera looking out of one of the huts. If you look closely, in the foreground watching this spectacle, is Yoda. It's very fast. Yoda was there with them, watching over them. If I knew how, I would paste a picture of it so I could back up my claim. He's to the extreme left of the camera's view but he is there, watching them.