"However, larger tents and young people who don't want to share a tent with Mum & Dad are a fact of life"

I get that.. I'm just trying to point out that when an invoice says '4 camping' it does NOT say '4 camping in 3 tents'. If you see 4 people with the same surname camping, my assumption would be that there is one 4 person tent which would take up considerably less room than the family 4 person tent and 2 'satelites' with young people in them - after all, if you have been used to a big tent, who goes back to a smaller one when the kids have branched out?

LTS