I know this is a weird question but I am leaving for the Camino in a few weeks time and have my pack and its contents all laid out ready to go. It dawned on me that I haven't packed any PJs and wondered what etiquette there is in the Refugios for sleeping. Is a t-shirt and underwear OK? Do I need to account for PJs? What should I add to my nice and light 7kg pack to be deemed respectable at night?