No Need for divorce
Do you have two cars? If so, no problem. Tell him he can stay, and you're going to visit friends/relatives far away from shore (better yet, up north) for the weekend. Make sure you have his insurance policy number before you go
Even if you don't have two cars, you must have a friend in the area in a similar situation. Have a "girl's weekend".
It's kind of a joke right now, but I'm not kidding about getting out of dodge and he's not kidding about staying. We have plenty of cars, but we both feel like the other one is being ridiculous. It's funny now, but won't be when THE BIG ONE is coming.