C-head has a well thought-out design that doesn't require power or a vent (venting is optional). I've had one for about 6 months now, and no complaints. For boondocking
, I think dry systems are the way to go. If you spend all of your time in parks with hook-ups, a black-water tank is an easier option.
Sent from my SAMSUNG-SM-N910A using Fiberglass RV mobile app