All you have to do is show Slave 1 lifting off and flying away behind the sail barges as they approach us in their first shot. Then all you would have to do is edit out all Boba scenes in and around the sail barge. Later on, you show Boba in the shadows right before the meeting (say handing something off to Mrs. President), maybe even show the Slave 1 flying out one side of the main hanger (say on the port side of the capital ship or out of another hanger) as the Falcon approaches, so Han and Fett just miss each other.

Hell, for that matter, you don't even have to do the second half on the rebel cruiser - just showing Fett leave would allow his character to escape with some dignity, which is really what a lot of us Boba Fett fans want.