PDX 1953 wrote:
IMHO if you show up at an RV park with RV license plates they'd wouldn't have any real grounds for refusing to allow you accomodation.
Depends. A federal, state, or county park, i.e. a public facility, you'll have no issues. A private RV park, OTOH, can do as they wish. Some do not allow school bus conversions, old beater RVs, or even tents. There, you might have a problem with a cargo trailer.
Years ago I saw such a conversion in a lakeside state forest campground frequented by dirt bikers. It was a dual axle cargo trailer with sleeping and cooking facilities, and fresh water onboard. They used a blue tote for gray water, with a cassette toilet. They had a portable outside shower stall with a propane powered on demand water heater, and a small gas powered pump that drew water from the lake. Very nice after a hard day on the trail.
If your Flex doesn't have the factory tow package, you'll need an engine oil cooler and trans cooler, plus wiring. You'll need a Class III hitch. The factory tow package may also include a HD alternator and larger battery.
The tow guide limits the tongue weight to 450 lb. A 4500 lb trailer will have about 600 lb of tongue weight.
The Flex is a FWD unibody vehicle. IMHO, if you get anywhere near 4500 lbs, it's not going to work worth beans. Too much tongue weight, too much trailer frontal area acting like a huge sail. Then there's payload. Look inside the driver's door for the yellow sticker that says something like "weight of passengers and cargo must not exceed xxxx pounds". Passengers + cargo in the Flex + tongue weight of the trailer + the weight of the WD hitch (about 100 lb usually) has to be less than xxxx.
Good luck.
