I think my fella would probably rather chew his own legs off than go to a 'folk dance and song club', so despite my curiosity that's likely to be something of a non starter... also having looked at the provided link, it doesn't exactly look 'me' either.

Marje, cheap and quiet is what we want. Plus we actually have a teeny portaloo from when we had a camper, though as you say, not quite sure how that would work out in a tent, even our new improved one...