A snack would be vital. If you ever wonder about whether or not you should recheck during the night. Just do it. Some people will bottom out on you and others won't. It is always better to recheck than to wonder if you should, then you decide not to and then you find out later that you should have. People go to the hospital to be taken care of. Don't worry about waking them up. Do all that you can to make sure that they are safe. Always trust your instinct when it comes to things like this.