Grape yeast makes delicious bread. Google Poolish and Biga to research. I have had artisanal breads made from both and they were delicious.

I read recently, maybe on another thread here or maybe somewhere else, that wheat berries can be ground up in a makeshift mortar and pestle using a can and suitably shaped stick. Wheat berries would keep better than flour and be less messy to carry in an on-the-move situation.

It's my understanding that OP can ban/block/delete/likethat an unpleasant poster.