I've been thinking a lot about how to carry a tender for Dragonfly. At 19'2", she's not what you think of as tender needy. It's about the kind of sailing and location. For overnight trips along the coast of New England, I'm more likely to take a mooring and need a tender to get one or two people to and from the dinghy dock. Occasionally, if it's off-season, I might be allowed to tie up at the dinghy dock, but I'd rather pay mooring fees than slip fees. I'm thinking a two person inflatable would be perfect to tow behind.
At 7'6", it's a smidge big to upend on the cabin top or foredeck, but maybe with just the bow chamber deflated. The Saturn is way too expensive, but this Walmart brand, at $270, could work and I could even replace it over 3 times before I paid for a Saturn.
Dinghy towing is a skill and shouldn't have a great effect on speed unless it fills with water, is towing at the wrong distance or flips over.
I'm also considering building something in the four and a half foot range to carry on the foredeck.
-Will (Dragonfly)