Create a "hidden" page within Structure Is it possible to create a hidden page within a Structure similar to how the Structure addon in EE does? It is still available at the url, but is excluded from the navigation. 

I know there are several ways I could handle this, 3rd level nav, possible custom field (lightswitch), additional structure for hidden items, etc. These just don't sound like perfect solutions. Any other ideas?
Well, a custom field actually does sound like the perfect solution. It's easy and consistent to check on all outputs and areas (sitemap/menu's/other navigations).