I've done both, and the experience of one informed his I approached the other
Went with the inlaws and some of it was ok but they wanted to do everything tigether, to the point where I said id like to go to x town for the day we could go on the train nice and easy. But no where would we have dinner. Well we could have taken sandwiches or popped into a cafe but no, we all had to go together and we just drive round it was raining and I remember sitting in their van having dinner looking at the rain thinking we could be in a nice cafe or in the museum, why couldn't everyone do what they wanted on one day, they didnt' have to come, they could have driven round in the wet all day and we could ha had a nice day and could have had tea and had the evening together
So with my children, separate accomodation, sometimes we do things together, sometimes do our own thing, often meet up in the evening ca imagine forcing adults to do what I want, best way for them to say never agsin.