Gail,
Don Daytony is active on the Yahoo Scamper group and he made a padded boot to fit his
Scamp 5th wheel. You might want to look at some of his pictures in the Scamper Overflow II section.
In the meantime buy a brightly colored beach towel and wrap it around the hitch. We usually unhitch the trailer but leave the truck parked underneath. That way no one can go through.
Nita