I have a 26 footer and have probably put more thought into dingys than strictly necessary. In fact, I have a spare room full of the silly things but that is another story.
My experiences:
#1 Tow rigid
hull inflatable. I used this
RIB at home to scoot to and from the
mooring ball so I already had it. Nice little critter, stable and fun but a drag to tow. Didn't take it on any trips after this one.
Achilles LT-2 with a 1.2 HP Tanaka
outboard. Wads up quite small and is very easily stored, motors around just fine although obviously not at any kind of speed. It was a PERFECT dingy for scooting around in sea caves as it was low and light but otherwise was a tidge short on carry capacity when there were two of us aboard. Initially I used a
plywood floor that tucked under the mattress on my quarter berth when not in use, I have since switched to a slat floor made out of Ikea
bed slats. I default to this one now for
single handing.
Instaboat folding aluminium
boat. Sort of a pirogue shaped fellow that folds flat and traveled lashed to the forward
lifelines of my buddy Stagg's boat (sister boat to my own) Paddles like a canoe, motors with little effort at all, he used my 2hp Suzuki but the smaller Tanaka pushes it with no problem either. Similar to a Portabote but lighter and obviously made of aluminium. Not a planing
hull so it's not as fast as the Portabote but it much nicer to paddle/row around.
Avon Redcrest. Takes up about 2x the space as the Achilles LT-2 which sounds worse than it is. Much more of "there's the dingy" as opposed to "where is the dingy?" MUCH more carry capacity and very well built. This one belongs to my buddy Stagg. I also bought a Redstart which is about a foot shorter than the Redcrest and lands somewhere between the LT-2 and the Redcrest size wise that I plan to use when traveling on my boat with crew.
Other than the
RIB which still gets used locally and now sports a 15HP
engine all my dingys use very small and light 2 strokes. My #1 choice is my Tanaka 1.2HP (Also
sold as a
Cruise n Carry) It is very light at 12 pounds and moves any of the mini dingys along just fine. The Suzuki is a nicer
motor (actually got it for my square back canoe) but given the choice I would take the Tanaka any time.
Obviously your mileage will vary but I figured that since your boat is bigger than mine anything that works for me would be a snap for you to stow.