If doing that the pressure cooker still works and you can use dry ingredients
Cooking in regular pot you need to soak rice for 3 hours and the beans for 12 hours. Rice cooks faster and without soaking beans don’t cook well at all in a slow simmer, you will need to cook for 1 hour the beans in a regular pot just top water till beans coveted as you will evaporate additional water. I would grease the pot first with raw bacon to help with scorching. Cooking in coals is fastest next best is over fire on tri pod. Since most likely you will have only one pot you can cook beans till done then add the soaked rice serve in 5(drain all rice water before adding in) all in one pot. Get a stir stick as both will require stirring to stop charing.
If on the move when you break camp in am put the beans in a ziplock heavy duty and add water then shape to the top of your pack the rice goes with the other person same thing. Keep the bags for next meal.
