I understand you are worried about not being able to sleep and then not being able to get up when you are unable to sleep. do you have a kindle you could bring with you so you could read or play games in bed if you are unable to sleep? or even play on your phone? or bring a book with a itty bitty book light so you don't disturb your husband. you could also just spend the time putting yourself in a state of deep relaxation, even if you cant sleep your body will be getting rest and that might alleviate the depression you fear coming on. take care