Easy Peasy....We do have a bathroom in the Casita
but mostly use the Reliance, below. I also have and use a Thetford similar to this (on Amazon):
THETFORD PORTA POTTI 260B MARINE 92862
Reliance Products Hassock Portable Lightweight Self-Contained Toilet (colors may vary)
We use kitchen bags and kitty litter in the Reliance. Have used the degradable bags and the Eco
stuff but too expensive and no real advantage.
Tie the bags when done and throw in the garbage. If you don't find that acceptable use the Thetford and empty in the roadside toilets (although, some rest areas may prohibit such disposal).