Some fish are bad to begin with.
That may work better if you starte the day before, then continue until the day after.
We have stayed for a week with good friends. But we do our best to make ourselves welcome.
One time, we told our friends to clean out their fridge, because our first stop was going to be the grocery store and we were going to cook for them all week. Mr. S brought his espresso machine and provided coffee service. We took one or two days to go out and about by ourselves, and when we were “home” we often occupied ourselves with a book or something. And so on. Our friends told us we could come anytime.