We have a local doggy daycare that KS has stayed at overnight twice. There is someone on staff there 24/7 and she loves it there! They take good care of her and we love it! I would take her there or take her with me if I had to go out of town. Has she stayed with the neighbor before? Maybe you could take her there for short periods of time before so he could get used to her surroundings? That might help and then it'd be like going on vacation for her. Good luck!