I try to leave all tanks close, sometimes I have to empty the grey tanks when the grandkids shower. I allways fill the black tank complety to flush it after emtying it before I break camp, most of the times I do it 2 times , I don't trust those cleaout adaports. With the new Jayco, you don't have to go inside to fill the black tank, you can do it from outside..
2011 Jayco Eagle 321RLTS FW
2012 Dodge 3500
US Govt survey shows three out of four people make up 75% of the total population