When my DD and SIL have gone camping with me, I sleep in TT and kids put up a tent. We do cook together and they even put their tent on my site (GA state parks allow a tent along with a TT at no extra charge). Depending on location we work showers between TT & bathhouse. We don't usually hang around inside, so there isn't much reason for us all to be tripping over each other inside.
I do allow DD & SIL to use TT as guest suite when they visit. It gives them privacy and us all a little breathing room. In fact, I have to go make the bed and put away a few things in preparation for them arriving day after tomorrow.