I camp 250 days a year... and being solo it takes a month for me to fill up the blackwater tank... never had a problem with that.. HOWEVER I would not want to be towing it with a full tank... but when the tank is less than 1/3 full I see no problem moving it or leaving it for a while... NOTE.. moving it does help liquefy the waste... ... and as a side note here... you know to NEVER leave the black valve open as it lets the fluids run away and the solids stay in the tank and turn to rock ...right?
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 765 watts of solar, 6-6 volt batteries (696 amp hour), 2000 watt (4000 surge) whole house inverter.
140 days boondocking in 2016
211/2015, 196/14, 247/13, 193/12