When checking out any National Forest land, we stop by the local USFS Ranger Station and obtain Motor Vehicle Use Maps. They are indispensable in providing all sorts of info, including areas where dispersed camping is, and isn’t allowed. All NF road numbers are listed. Always check with the rangers as to the condition, and suitability of roads for your rig.
These maps are available in all NF’s, even in the east. If nothing else you might find some fun Mt. bike roads/trails.
2012 F350, 6.7L SRW
2015 Alaskan 8.5 Cabover