Just a quick note about SEPTIC SAFE TP. There may be a few unknown brands that can damage your septic systems digestive process but I bet that you wouldn't use it anyway. The "non-septic safe" TP of old is, "of old", the paper making process no longer uses the chemicals that slowed or stopped the digestion process.
Labeling a particular brand as SS is a sales ploy.
There are more brands of additives that use harmful chemical than there are TP's that use them. Motion, water and ventilation are your friends in an RV waste storage system not useless ads.