If you are in a small area, someone knows someone who knows these folks, or if you recognize them in their car, wave them down when you pass and introduce yourself, or keep an eye out for them at home.
If I were in N ID, I would invest in a sturdy greenhouse. Where I live, on the Wet Side of the Cascades, hoop houses work fine for the occasional snows we get, and plastic sheeting works fine over the top. Some folks have metal hoops, but many get by on PVC. Cattle fencing panels make good base structure for small, moveable greenhouses covered in plastic. That might be a good place to start, simply placing these over certain crops. It wouldn't be insulated, but it's amazing how much you can achieve by keeping out snow and protecting against frosts and rains.
How do you keep it warm? Make it big enough to have room for compost piles and chickens in winter. Attach one onto the house.
If lived there and wanted to extend the harvest in both directions, I definitely would throw as much money as I dared at these things. I would invest in multiple, smaller inexpensive greenhouses, some portable, and then you don't need as much space for the "big greenhouse".
"She is a mermaid, but approach her with caution. Her mind swims at a depth most would drown in."