I agree with the idea of having a backup plan in place.

How is it unforgiving of you where it's his family and his rift? That makes little sense to me on his end. Plus, just because they are his family, doesn't make them anything less like strangers to you and your kids where there's been no contact most of their lives and I'm presuming most of the time that you've known your husband. Of course you feel hesitation. Gosh, staying at my dad's for a couple of days with kids and other new to me adult children last month was anxiety provoking. In a town I'd never been to and a serious lack of coffee...

I digress. Hoping he'll show you a little compassion. Maybe he's realizing his parents are aging?