The biggest limitation in off road in the PNW is turning radius. Next would be wheelbase (which relates to turn radius)
When you have trees everywhere and tight spaces the turn circle is very important. My latest truck is a leaf sprung diesel ford and it has truly horrible turning radius. It's an issue even in town, so on the trail it will be a major factor.
I had a Suzuki x90 for many years. It had 27" tires, open diffs and not much else and it would embarrass larger rigs on the trail because it was short, light, and maneuverable. But, if you brought a friend and lunch, it was full to the brim.
So if you want good off road ability in this region, make sure you buy a coil spring suspended front end truck and check turn circles. You can always add ground clearance.