I think it's very difficult for these communities to have field hospitals, at least as I know them from the military. We'd have an operating room, ventilators and ICU capacity for any prolonged period of time. These communities, even the largest of them, have maybe 3,000 to 5,000 people, so it would be hard to sustain field operations for a prolonged period of time.
I think they could have a fairly minimal set-up, with some sections of tentage, to provide primary-level care for patients with COVID so that they're separate from the rest of the community. It's basic nursing care, but with the idea that if they were developing respiratory distress, they'd be evacuated quickly. Those with relatively mild cases could be kept in the community, and then once COVID-negative, they could return back to their homes.