hosting with anxiety

My husband invited a family with kids to stay at the in-laws’ condo with us and our kids for a ski weekend, and I’m kind of freaking out about it. They’re nice people but this will be much more time together than we’ve ever spent, and with the added anxiety of parenting young strong-willed children in front of them, and being a welcoming host in a pretty small space.

Welcoming any tips - either of the practical sort (e.g. the highest impact things to do to be a good host - ), or mantras/reminders for myself to try to keep calm beforehand or in the moment.