Towing my motorcycle with our 24' C

Yup, mine has a nut that you turn one way or the other to engage the low range or normal range. Some have a large trail sprocket that you fit over the normal one with some fiddling. I have carried it on the front of our VW bus camper and on rear of Class C's. It's fairly light weight with 40 pound aluminum hitch rack doesn't upset balance of a rig. You can still buy these on Craigs list for around $1000 in good condition. The 70's vintage ones have better front suspension and there is a 110 cc version with a little more oomph. Mine goes 45+ mph flat out. They have a combined shift and clutch and front lever actuated rear brake, plus rear brake pedal, for and front brake lever so you can shift gears etc., while climbing steep grades, etc. These bikes are still available new from Honda in Australia, sold to postal service and called "posties". There is a "Trail 90 cult following in the US and parts are available.

Only drawback is that some campsites charge you for an extra vehicle.