Dinghy towing is the name for flat-towing a car behind an RV without a trailer, not towing an actual dinghy boat. With the proper towing accessories and some cautious driving, it's an easy task.
Park your big-rig and use the relatively nimble car to drive into town for supplies or any sort of venture away from the campground with ease. There is also the added security of having an extra set of wheels in case of emergency.
The first step is to calculate your towing capacity. Do this by subtracting the fully loaded weight of the RV (passengers plus cargo) from the gross combined weight rating. Then compare that result with the total weight of the dinghy car (with full fuel). If the dinghy weighs less than the total RV weight, and the vehicle manual is certified for four-wheels-down towing, you're good to go. Front-wheel-drive vehicles with manual transmissions and most 4WD vehicles are the easiest to tow, and most times they will hardly be felt.
The trick is the lubrication: in automatic transmissions and pump-dependent manuals the output shaft isn't lubricated unless the engine is running which can result in severe transmission damage. Mechanical linkage between the vehicle and RV is another essential component in safe towing. Hitch receivers, tow bars, and baseplates are all important factors to make sure are in perfect working order and properly attached.