My Tizzie (now at the Rainbow Bridge) had did have a doggie dementia at that age. Now that I think of it, she would try to crawl under the bed at night and then get stuck there and not be able to find her way out. She also did a lot of pacing and would end up in corners or under other furniture, like a chair or hutch. I do hope this isn't the case with your dog and that he is simply unused to the new sleeping arrangements and will get again find a place that suits him.

My Hannah is very finicky about fresh water. When she wants some she will go to the bathroom and scratch on the base of the toilet, even though she doesn't get to drink out of the toilet, she has somehow associated the toilet with fresh water. Sometimes she will just stand in the bathroom by the toilet. When I sense that she is in there, I get up, fill her dog bowl with fresh water and she gets her drink and comes back to bed.