Vacation without kids

I know this is not a novel topic so I’ll try to be brief… my husband is traveling for work to a very nice tropical destination where I also have family. Because of his work / airline miles, most of the trip will be paid for us. My parents have excitedly offered to watch our kids (4 and 1.5). Right now I’m booked to join him for four nights.

This is a dream right? Maybe? I’m struggling. I’ll be a 6-hr flight + 2-hr flight away from my sweet kids. I’ve never been worried about my parents with my kids, they’ve always watched all their grandkids, and they’re super active generally. But they’re in their early 70s and my kids wear me out every weekend.

My husband is not worried. My sister who sees them regularly is not worried. I would be THRILLED to have time with my husband, and to see some family, but I’m also freaked tf out, man. Recognizing there is no “right” answer, what would you do?