Yes, I think your assement fits.

Originally posted by: auraloffalwaffle
in Yoda's mind, the return of the Jedi is the only hope for the galaxy

I don't doubt this was Yoda's opinion, but I have to then think that he had pretty much stopped caring about the galaxy by the time of ESB. Let's assume that he knew where the young Luke and Leia were "hidden" (I say "assume" because I only saw the PT once, and even if it establishes that he knew I still don't consider the PT to be gospel to my perception of the Star Wars story). What was he doing in that swamp? I guess you could suppose that he was counting on Obi-Wan to lead Luke to him, but what about Leia? You'd think he'd have some sort of plan for getting her trained. Since apparently he didn't, I would assume that he had grown tired of the struggle and didn't care so much. Now, once Luke did find him, it would seem that his hope & concern for the galaxy had been renewed. But prior to that...........