To be honest I got rid of everything else except for the terrain and the buildings which I dropped on the terrain and purged everything else (assuming that this is a visualization rather than a model organization exercise). But yes, that worked well.
Btw, if you folks want to stay up to date with the stuff we are working on we have opened an Alpha/Beta testing group for XR if you want to join. Read more here: SketchUp XR - Join our Alpha/Beta Testing Program