Very useful resources!great question, lots of options.
How to Go to the Bathroom in the Woods | REI Expert Advice
We use these for weekend camping trips
RESTOP 2 DISPOSABLE WASTE BAG | Next Adventure
works VERY well with a 0.50 cal fat ammo can
Military Surplus Fat 50 Ammo Can 50 Cal Grade 2
alternatively, for multi-day river trips we use a multi-dump unit...
this fits in a rocket box ammo can
ECO-Safe Toilet System at nrs.com