Sally, we will be thinking of your husband and you, praying for a successful surgery and speedy recovery.
I'm glad you were able to arrange for the table. That will be very useful and protective. I also agree with everyone who says Harry will likely know what's up and go easy on your husband. We had a recent experience in which my boys amazed me how intuitive they were, and how accepting they were, and how they behaved in such a helpful way. Dogs are so smart.