According to the expanded universe, he really should've stuck around to finish the job, because when Luke returns to Hoth in the novel Darksaber, that motherfucker comes for him like the shark in Jaws: The Revenge:
"He then used his lightsaber to poke at its dick a couple of times. Just to be certain."
That's right -- that wampa harbored an armless vendetta for years against some guy whose face it barely saw, and when Luke finally comes back to that godforsaken ice planet several years after Return of the Jedi, it forgets how to properly avenge itself and gets magicked in half by a white-hot blade of science fiction fantasy. This is after Luke and his companions wade through a mob of other wampas in the abandoned Rebel base from The Empire Strikes Back. So it's like Deep Blue Sea, in space.