Window size Four Winds Majestic 28ft & tow hitch nose weight

Have you considered carrying a scooter in the front?

That's where I would carry one, since the rear overhang of Class C motorhomes is so much greater than that of Class A/B motorhomes and trucks.

We carried a scooter on the rear of our motorhome. It was 23ft long. We had an attachment welded to each frame member so that we had the trailer hitch plus a attachment on each side for a total of three connection points.

The issue is how much over hang behind the rear tires. How much leverage the extra weight of the scooter exerts.

Our experience: Scooter and scooter carrier weight about 500lbs
W/o scooter: Front axle - 3750 Rear axle - 6800 Total: 10600 lbs
With scooter: Front axle - 3400 Rear axle - 7700 Total: 11100 lbs

With the smaller motorhome we had capacity on the rear axle for the additional weight. If you have a larger class c which is near carrying capacity the scooter will add way to much weight to the rear axle.

Our unit drove fine with the scooter on the back. Actually was smoother ride and no handling issues.

Loading and unloading the scooter was not too bad...just took a little practice. We would start the engine and power the scooter up the ramp while standing beside it.

You may also have to worry about clearance (dragging). Our motorhomes trailer hitch was pretty high so there wasn't a problem with the scooter carrier dragging when we encountered dips like you have going into a gas station or something like that.

I suspect getting a canoe in through the back window would be tricky. The openings aren't that huge typically. (On my coachmen, the opening of the exit window is 20" high and 28" wide.) A canoe is also going to extend into the motorhome quite a bit, and probably block the bathroom and/or kitchen access while en route, assuming you can get it inside.

Typical class C trailer hitches are limited at most to 500 pounds tongue weight, though you really need to find out details for the particular unit you're looking at—they can vary quite a bit. Assuming you're thinking of a motorized scooter, I would not really recommend carrying one on a hitch-mounted luggage rack; those racks apply stresses to the hitch that are rather different than a trailer (greater lever arm length) and often are not all that stable in terms of lateral rocking. Getting the scooter on and off the rack wouldn't be too easy, either. Putting several hundred pounds at the back is also going to affect your weight and balance some, which may or may not be a problem. (Very roughly speaking, the scooter would probably be about as far from the back axle as the front axle, and so every pound of scooter would load the back axle two pounds and unload the front axle one pound.)

There are some semi-custom designs with additional supports and ramps that are sturdier, which would help with some of the problems, but any weight and balance issues remain the same.

A small trailer might be more practical, though of course it's also more of an annoyance when traveling.