Hey hey,
I have a very small dinghy, just 2,4 meters long. But it has an aluminum floor, so it's very stable and good to bring out the 2nd anchor if needed.
It was a cheap dinghy, actually I have some footage about it. Maybe I'll do a post about it soon.
The problem is: I have only a 35 ft Dufour, and I have to store it somewhere. If not needed not on deck. So the little dinghy fits perfect at several places ;)