Hey, for extra transport without breaking camp, my wife got a Zuma scooter
by Yamaha.  She puts it into the tack room of her horse trailer and takes it
to the horseshows with her and we also take it along to the desert in
winter.  Has a compartment under the seat that will fit a bag of groceries
or a laptop and carries two, in a pinch if you're not in a hurry.  Larger
tires, so it works on gravel roads.  Automatic clutch and tranny..twist the
grip and it starts out, no shifting either.
  Good lights, goes about 50, has been eminence free for about 3 years now
with an abusive owner who loans it out to everyone at shows, etc.  One would
fit on a receiver carrier and they are quite light. Only drawback is the
fuel capacity is small, limiting range to about 100-125 miles..Two stroke..
  Don Hanson