Thanks for all the replies. I have another query about dumping at a dump station. I have only seen videos of RV's dumping black tanks through hoses. Where would one dump the contents of a porta potty that was filled with cat litter or something similar. If you have any experience with porta potty dumping either at a dump station or say a gas station, please share. It seems very unsanitary to me to take a bag of poop and leave in any public trash bin.