I say you do what you want to do. And try to detach from her reactions. That's oh so hard. Do what you want to do, for YOU. Don't do something to get a reaction from her--that is still letting her set your agenda to some extent. It's easier for me, as I'm out of the house and she doesn't see what I do each day, so I can imagine it must be hard not to watch her reactions. They are her issues, not yours. Have a great trip. Try not to think about her. I know, easier said than done.