With all the dogs I have had I knew there would be sacrifice's I would have to make. I was a camper for 25 years so traveling with my pack was never an issue. Where ever I went, my babies came with me, holiday dinners, visiting friends, the girls were always with me. If they couldn't come, I wouldn't go. my pack has now passed,I now have a rescue boy, he was 2.5 yo when we hooked up, we are a team for 5 years now. What I have noticed is, when we are with ppl he does not know he is constantly jumping up at me to hold him, at first I would put him in a sit and stay command, he would pant like crazy. I have come to realize as a rescue I believe he is afraid I am going to leave him with these strangers. He cannot be crated, not even at the groomers, he goes crazy, bites at the crate, I believe he associates the crate from when he was in one before I rescued him.
I am no help for your situation because, I will never leave this dog with anyone. Kennels are out period. If I cannot take him, I will not go. I will not put this dog through thinking I have abandoned him, he means to much to me to put him under that kind of stress.
I do hope you find a solution.