Foraging cultivated things people don't want works too! I have harvested Olives too from abandoned groves in California and processed them. And I've also harvested Persimmons and Citrus that was planted. It's more like 'gleaning' then!

The only thing about the open spaces is that everything is such a far drive. I'm alone a lot, or never alone. It takes awhile (and gas $) to get places.