"I'm adequately rested," was Percy's reply. He didn't sleep wonderfully - he usually woke up a few times during the night with things that needed to be done right away. Something that needed to be cleaned, or something he needed to organize, or even just remaking the bed. But otherwise, he slept decently enough.
"Yes, I know. But the doors are locked at night. There's no way for anyone to get in, even if they were a vampire, or a werewolf, or anything else," he said reasonably. "They're locked in their rooms and we in ours. I imagine night is the safest time, really."