For me, a wheeled tote tank proved to be the biggest waste of $$$ mistake I've ever made since we began RVing years ago. :( Costly, heavy when full, still heavy when empty, awkward to clean thoroughly so it doesn't stink, takes up too much room in the truck for transport, looks ugly hanging off the back of the trailer, is awkward to store out of the way at home, and always threatened to pop off the hitch ball as I towed it over bumpy campground roads. :M It only took a few trips before I realized the error of my ways and sold it to another unsuspecting RV owner who also thought this would be his answer to waste water management woes. With the proceeds I bought a FloJet Waste Macerator so I can service my tanks here at home but anytime I may find the need to off load black water while camping I can pump it with the macerator into a few inexpensive 7 gal Aquatainers labeled for GW/BW use that sit in the back of my truck, for a later trip to the dump station. Grey water I usually don't even bother with the macerator but simply gravity feed it into those same GW Aquatainers. K.I.S.S. - no tote. :)