You need to either warm them up (75-85 degrees) or cool them down (45 degrees): they need to be kept at summer temps with lights on 14 hrs. per day, or they should be allowed to hibernate more fully at cooler temps. Anything in between isn't good for extended periods.

If I were in your shoes I'd try to create a barrier around a good place for them to hibernate outside, so that they don't get exposed, and let nature handle the rest.