Ledkr, it isn't an insult, it is a statement of the truth. Ignorant means you are unaware of the facts.
It is a fact that it is possible to get all your camping things onto a bus, very easily, you were unaware of that fact. It is a fact that many campsites are served by buses, you were unaware of that fact. it is a fact that it is possible to pitch you tent for well under a tenner, and often for free, you were unaware of that fact.
As I said, there are many different levels of camping, you are obviously camping in a more luxurious and extravagant way, and are unaware ( ie ignorant) of the cheaper levels.
I am not desperate to get any point across, I am providing information, you are the one being rude, why PYL at information that someone else has provided, just because you were unaware of it?
Anyone CAN camp, doesn't mean anyone should, as I've said. You have to be upbeat and cheerful about anything that happens, so the kids enjoy themselves, or there is no point.