At the end of the New Jedi Order series of novels, it seems that the entire Yuuzhan Vong population was rehabilitated as settlers on Zonoma Sekot. But the Yuuzhan Vong population formerly occupied an entire galaxy, and hoped to occupy the Galaxy Far Far Away. How did they all fit on one planet?
First at the end of LOF many(most) of the YV have been destroyed.
Second through their bio-forms the Vong were able to quickly overwhelm and occupy a planet then manage it with a relativity low number of Vong when compared to Republic or Imperial occupation forces.
Finally Zonoma Sekot was described as being a very large planet several times the size of Coruscant.