If I were in your shoes, I would just let him pack away. He's frustrated and he's finding things to do and hoping against hope that the virus disappears over night. When he is elsewhere, I would take a peek at what he's packed up. If there is anything that you think you will need, then remove it from the box and store it in a safe place. They have a tendency to take things that we won't miss until much later. BTW, he doesn't have a clue as to where he's taking the stuff either...unless he's seen some ads where the storage facilities are allowing people to store stuff there for a while (ads that actually pertained to college students kicked out of dorms, etc.).
The more you draw attention to what he's doing, the more determined he will be to continue doing it. The less said, the better. Now, if he begins packing up the inside of your house, now I think I would have to call him on that.
For now, observe and listen. As I mentioned, when he's elsewhere, take a good look around your garage to see what's missing. I'm sure he's not going to be to stay at home for much longer because, like a teenager, he has this need to be free and out from under the same roof w/his family.
Stay safe and above else try to stay healthy. Leave your man/child to his packing...I would bet money on the fact that he won't be able to find a thing when it's time for him to need something. He will swear you hid it and it will be right there in one of those boxes. It's happened before to others. Dig deeper for patience. It's a marathon, not a sprint.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
