Hmm...this one's new to me. But, having been out of the program since '97, a LOT is new to me.
I know when I was in Webelos, my den went on one or two campouts with the troop, but not "with" the troop. We maintained our own campsite, ate our own meals and did not interact with the troop except to learn some basic camp craft. And even then we sat together as a den and some of the troop's PLs came over to guide us under the supervision of the den leader. This would have been, oh, '84, so well before the days of YPT and 2DL.
Of course, with a lot of the things have reared their ugl