I don't meant the type of holiday where you're mostly lounging around a pool/the beach, I mean a city break where you're walking for hours and public loos are not at hand. I worry about this so much, desperately needing a wee and not having anywhere to go, that I don't drink, but then I feel really rubbish, look shirt and I suffer from kidney stones so not a great idea all around. Should I wake up early, drink a whole litre and hope I wee it before we set off?