is it really necessary to use the RV toilet paper especially when you are dumping into a city holding tank which is basically the other city sewer I know an RV park that has city sever service ( the same as if you used the bathroom in the clubhouse and flushed ) it all goes to the same place ?? aside from some warnings about the biodegradable needs to break down in the holding tank blah,blah,blah is it just a suggestion to use the RV TP while regular camping and the good stuff ( regular house hold TP ) while at the city sewer park ?? what would it actually do, I can rinse my tank after the final dumping before leaving the park ????