Just pack your shit and get out!
Shit Box (around $30) is a lightweight portable cardboard toilet, made specifically for outdoor use.
This is deal for camping, festivals and pretty much anywhere you need to take a shit. The box pops up from a convenient 14inch flat pack to a rigid, reusable, comfortable toilet. Each box comes with ten degradable poo bags.
And for no particular reason this Shit Box stuff just remember me of this:
Manfred: “Ok you, check for poop.”
Sid: “Hey’ why am I the poop checker?”