Benita,
Buy 2 trailers, one for grey and one for black water. Can't you just
a behemoth RV waiting in line at a dump station, behind a Cruzin' Cooler and 2 trailers?
What ever the price is, it would almost be worth it just to hear the comments under those circumstances.
Next summer we'll probably see some enterprising kid towing a light-weight aluminum 50 gallon tanker trailer and making the rounds of a campground emptying tanks.
Kurt & Ann K.