Hi. I was in a similar situation where through my married life we bought up my sisters children as well as our own, the only holidays we could afford for all eight of us was Butlins!
However I took the plunge and have been abroad a couple of times to Europe with Just You and enjoyed every moment.
On both holidays no one was left out and you could join in as much, or as little as you wanted to.
I am confident that you will not regret your decision