Thank you everyone for your comments. All of them are really useful. Any information is good!
I really appreciate your frankness is talking about this. I was very surprised at your comment, David, because it just hadn't occurred to me that someone might feel ashamed or embarrassed. It's an entirely logical reaction. I felt that way when I needed my adult diaper changed by my husband after a caesarian birth. It just hadn't occurred to me that Dad might feel that way now.
I'm feeling some trepidation about the trip, but I do think I can be useful. Even if its just picking up the meds, or turning his phone on silent if that's what he wants.