i can't imagine being on an overnight school trip, my parents were too strict but i guess it's part of the culture?/just a thing that most schools do even without parents supervising, but relatable tho i would've gone to the bathroom way before bedtime unless i drank a bottle by my bedside or so lol
tho i guess other than an old traditional style inn i would hope the bathrooms would be close by if only to prevent late night kids wandering around