Jabba would never disrespect Vader this way. Jabba knows who Vader is. He would be afraid of Him just like everybody else. Vader could kill everyone in that room without even blinking.
How pissed off must Vader be to have to set foot on Tatooine? He hated sand when he was Anakin - getting any inside that suit would be hell, and as we know, it gets everywhere.
Vader: I need one of your bounty hunters to track down and bring my son to me. Jabbba: Why? Can't you do it yourself? Vader: No. He has two healthy legs. He can run faster than me.