Friends AND relatives BELONG in their OWN camper/RV/tent.
My friends and relatives do not "live" in my sticks and bricks, I would not want them living in my camper while I am there.
I have on many occasions considered "inviting" them to camp (with their OWN campsite) but then I CAME TO MY SENSES and don't bother asking them :S BEFORE I actually did :B
I don't care for "group" activities and other folks ideas of what I should be doing, when I should be doing and how I should be doing.
Sometimes going alone IS the best way to STAY friends and family well lets say in my case a much better relationship. At least we still are on speaking terms (if we attempted camping together I doubt my family would ever speak to each other again. But maybe that's not all that bad either :S