The nesting dinghy was a PITA that constantly snagged jib sheets and
filled with water when towed. So, I gave it away.
So, next experiment, an 8' Porta-Bote I am looking at on Craigslist
and will get a 2.5 hp motor for.

So far I have tried:

an 8' Nautilus dinghy--------Far too heavy. Gave it away
a Sevylor inflatable. It was crap
an inflatable kayak. It was crap but wore it out.
the nesting 2-Paw-9 dinghy, home built. Snags sheets and does not
tow well. Gave it away.