Mom, dad, chill!
No need for screentime!
In front of the hotel is the lakeshore, behind the hotel is the forest. The kids don't even think about getting their phones out, except perhaps to take photos of the highlights of the day, because there are plenty of them, and all free of charge!
The children are not left with us, because we have made our entire setup up here family-friendly so that the children can do their thing without having to be looked after or entertained. Of course, there is childcare in the afternoons during the vacation periods so that mom and dad can chill out in the spa or simply enjoy some time together.