Charis1 I appreciate you are trying to convey the wonders of camping to everyone, and I am really glad it has worked out for you and your family. And I've said that when I was younger I did camp - I can build a fire with the best of them, and I hope that my kid (who is as urban a child as is humanly possible) gets that chance someday soon.
But camping isn't financially viable for everyone, however much they might or might not be into it, because of the car issue. Clearly, going on public transport works for you and your kids, but I could not physically do it, even though I could borrow a tent and could afford to pay for a pitch and so on. I could not get even the minimal equipment needed to a campsite on public transport, because I could not physically manage it. I could not go camping unless I had a car to take all that shit with me, and since I don't, I don't go camping.
(Disclaimer: I love public transport! It's all I ever use! But there are some things I cannot manage on it.)
I don't even have that many physical problems, I just have some things I can't do, which include not carrying very much or skipping sleep. Many other people have more restrictions on what they can carry, and smaller children (who need more stuff and who can't carry it themselves).
I hope you continue to enjoy your camping, but please lay off the "it's possible for anyone on tuppence!" thing, because while it may be for you, it really isn't for anyone.