I don't know if ORBX PNW has re-created the area in detail, but might I suggest trying your hand with some of the Idaho backcountry strips like Mile Hi, Salmon Arm, Johnson Creek and similar ones like that?
According to the Backcountry/ Off Airport Community, the Idaho Wilderness is one of the most popular areas in the US to fly, and some of the best environments to learn Backcountry flying.
Mission Aviation Fellowship (MAF) trains quite a few 'prospective' Pilots by using these strips; they fly Kodiaks and C-206's onto (into?) them on a regular basis.
Quite a bit different than your typical Q400 or ERJ regional hop...
Hope this helps!