1. Nobody is offended when you want to go off on your own.
When traveling with others (of any age), you always end up needing some alone time. Older folks get that loud and clear. Don’t think that they love being with you 24/7 either. It’s totally fine if you want to go to that disco the cute Italian boy invited you to; they’ll happily go to bed. Nor will they have a problem enjoying their morning coffee alone at the local cafe while you sleep in.