Hi, Im not sure if this would be any help as im only 14 and abit dumb
About a year ago, my cat bought in a wood mouse, he was really small and very disoriented, so i put him in a little hamster plastic cage, and he started to make a little nest and he started to take the guinea pig food into the nest, so as the cage was a bit too small, we put him in a massive fish tank with wood shavings, artificial bedding, hamster food, a log toy with holes in and even a hamster wheel! (the fish tank was secure as wood mice can jump) So he started to become quite domesticated, but I thought that he wouldn't be able to survive in the wild any more as he had got used to living like a king
So I decided not to release him, as it would be an even bigger shock to him and my two cats bring in so many mice and voles that he would eventually be eaten. So I think the best thing to do, is try to catch as many as you can, (as they are obviously a family) and release them together somewhere away from your house, and other people houses (in case they have cats) and put them somewhere where there is a shelter, somewhere like an old deserted barn (if that is possible to find)
Hope I helped.. A bit
Ellie xxx