In my
ParkLiner I have:
30 gal waste grey water tank, vented to the roof
15 gal fresh water tank
I probably could add a small tank or 2 on either side of my hot water heater, but I usually travel with a 7 gallon jug from walmart which is what I used to use for drinking and coffee, and washing dishes for a 5 day weekend... I just need to do military showers inside and it should be fine.
deryk