The answer is obvious: you should thaw them out. Why would you even consider freezing along with them? The goal established, it's now a question of how to accomplish the state change. In so many words, HOW to thaw them out? Whatever you do, though, you should ensure the approach is proportional to the problem. In past years of adventures, you've been guilty of perhaps, how to put it gently, slightly over-engineering your solutions. So, again, what's a nice simple way to thaw out these good people?