I am so sorry for your loss. It's so very hard to lose a life's partner. I would not presume to give advice, but just a suggestion or something to think about. My first husband passed in 2000 (also after 37 years of marriage). I began writing "letters" to him...if you should decide to keep the RV and take some trips, maybe you could keep a notebook and write to her, telling her what you saw or what you did. I have also painted little red hearts on rocks and left them in places I had wanted us to see together. I hope you can make the decision that you think she would want you to.