I have done this, a few times.
My home country is really, really large so there were huge differences in what we did if visiting bear family or visiting the country but in another part, many, many hours away.
When I wanted to be in the area near my family, we spent a few days with them before our sightseeing part of our holiday visiting areas of interest where we stayed a couple of hours away and moved around
We also had a holiday in my home country where we rented a hiuse to stay but we were for than 24 hours drive away from the area I’m from. No problems.
However, we had the shit hit the fan when we rented a beach house an hour drive away from my family, they continued to show up, regardless if we said we were going out or having other people come over. They showed up regardless when we said we were taking the kids to see something on the next day and were furious we weren’t there to entertain them/use our beach house. So be wary,
The camper van idea is a great one because you can’t host them and you’ll be moving around. But if you start it end your journey near them, yes be sure to see them or they may be problematic about it.