Have you ever been a few too many hours deep into a gameplay session, and had to run off to the toilet? Well I can't neccessarily recommend a solution for that, other then projecting that pain into your character in game >:3. You see Minecraft ships with a hunger mechanic, a sleep mechanic, and thanks to friends a mental health mechanic. But they left out one thing, what happens when you eat food?
So I've implemented A full fledged bathroom need system, so now you have another thing to check off before you go off into the mines.
1: Build bathrooms in accessible and convenient places, generally around your little city and near places you expect combat.
2: Use diapers to manage your waste, and change when your diaper is full.
Secret 3rd Option: Doing a hybrid, using diapers while you're out, and using the potty when you're home! Which is the most efficient approach!
And make sure to have fun pup :3!