Is there a way to limit the questions displaying on the JOIN HERE page so as to require less pages?

Yes. Just click your Profile Generator link. Any of the default member questions can be deactivated. You can also add your own questions if you'd like

One very important tip: Make sure you don't change the intent of any of the default questions. If you want to change them in some fashion, you are usually beter off deactivating the default question and adding your own. More information about this is on the Profile Generator page itself.