Anybody know some nice bush flying environments for MSFS2020?

Criteria are:
>short and undeveloped runaways
>high airfield density
>challenging terrain

I want to make short, technical trips in slow planes like the Savage Cub or at tops the Baron. I love the area around S10 Lake Chelan Washington, but there aren't many airfields in the mountains around the lake and since you can land these planes anywhere technically, I wanna stick to airstrips for the challenges sake.

Also any free/cracked steamgauge aircraft you know of?