I'm an "elder millennial," and my younger brother & I really enjoy traveling with our parents, now that we are middle aged adults. But I can't imagine us ever complaining about free accommodations?!
I'm not trying to call out your kids, tho. Maybe the problem is privacy? It seems like for 5-10 pts more per night, you could get three studios, instead of a 2bd. And while you can't get connecting rooms (outside of Poly), you would still be in close proximity. I know that the older I get, the more I hate sharing space.
Hope this helps, friend!