Forgive me if I’m mistaken but I would assume you can take them on holidays including some E.U countries with the green card. Sometimes we need a break or holiday to relax, unwind etc as I’m certain it boosts that of our mental health and in theory overall well-being. There is a faq section on taking your vehicle on holiday/abroad with useful info.
Some people like myself have family in the other end of the UK so booking a short stay or weekend break and visiting them inbetween would require using my vehicle to get there and back. I hope Iv been right in what Iv said ?