I have a 170. I use regular grocery bags inside a collapsable (waterproof fabric) bucket, in case of leaks. Also use this bucket to load a couple gallons of clean water into my grey and black tanks after I dump my tanks.
While traveling, I'll hang the garbage bucket off the passenger flip-up armrest, or put it on top of the toilet (so the dog won't get it) if I leave the van. I also keep a large ziplock bag in a door cubby for dry driving garbage.
While camping, I hang the bucket off the driver's flip-up armrest, or put it up the dash. Lastly, I keep used paper or plastic cups in my plastic sink tub for the really gross/wet food stuff garbage, and sometimes inside a ziplock if it's smells.