in laws live 3 hrs drive away, my parents only 30 mins and they have boys to stay once month to once every couple of months but when he is anywhere but in his own cot he won't settle without screaming and crying for at least an hour even if he's absolutely dog tired and then wakes constantly in the night - do we just have to accept if we want sleep we stay at home for the time being? is this normal or is there anything we can do to reassure him?