DS is 3.2 and has been potty trained for about a month. He's doing really well and only had a few accidents. Two of these accidents were when he was having a nap. He's in a pull up at night and rarely naps in the day (he's a nightmare at BT if he naps). We're going on holiday in a few weeks and I know with the time change and busy days he'll have naps most days. Should I put him in a nappy when he seems sleepy? We'll also be doing some long car trips so I'm considering nappies for thoses. I've heard that you shouldn't put children in nappies after they've been potty trained but I don't know what to do.