I'm glad your neighbor is going w/you to you vacation home. Your neighbor will provide some company on the trip as well as at your place. In fact, the neighbor may enjoy seeing the area and it will give you something else to think about besides your h. Will your friends be coming over to visit while you are there? If so, maybe they won't bring up what your h is or isn't doing these days. It would be nice if you could just leave your situation at home and just enjoy a few days of rest, sun and fun for a change.
If some items are bothering you, then move them and/or replace them w/things that you enjoy while you are there. There's nothing wrong in doing this. Make it your space during your stay.
Bottom line, drive safely and enjoy your time away w/the company of your neighbor.
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.