Forum:KB:Confusing Character Combinations on Tatooine in Episode VI

Dear Experts,

After watching "Return of the Jedi" I have the following question about the rescue of Han Solo: Are Chewbacca's/Leia's plan and Luke's plan separate from one another? And how does Lando fit in? At the end of "The Empire Strikes Back" Lando and Chewie leave Luke, Leia and the Droids to go rescue Han, and at the beginning of RotJ C-3PO says they have not seen them for a long time and wonders what has happened to them. How come Leia then appears with Chewie? How/when did these two groups come back together only to separate in a different configuration? Is it 3 groups and Lando is on his own rescue mission? Or are they all in on one big plan? Help me Wookieepedia, you are my only hope!

P & I