I'm looking at doing similar on my parents farm in WV. Also thought about supplementing with a small windmill.
I'm planning for no 120v at all since I don't want to be running big things like A/C. Mine will be minimal for things like recharging AA batteries and such. So I'm keeping to a 12v setup and using automotive components. This way I don't need an expensive inverter or have any loss due to converting to 120v then loss again converting back down to low voltage.
If you haven't built the cabin yet, there are roofing panels you can buy, they are not cheap but you don't have to put a roof covering on first as its combined with the panels. I'm leaning toward this as it will be somehat stealthy and not look like a solar panel.