I agree with Barb on this one Meg, doing crunches in that top bunk might be kind of squeaky. You may need to invest in, some sort of portable light...either of the above will do.
I too Arielle, love to write, when I get insomnia. I have awoke, to find some pretty wild things written on that note pad. It's amazing, where your mind can take you, when you are between consciousnesses.