I do a fair amount of mapping in my work and have found TopoFusion and CalTopo useful on the desktop, and Gaia GPS on the smartphone. MAPC2MAPC is great at converting between different map formats. TrailForks and MTB Project provide good trail coverage. iOverlander is also an interesting resource.
Like your rig. We just acquired a F-350 w/ utility bed last May!
2006 Ford F-350 crew cab, utility bed, 4WD, DRW
2007 Northland Polar 860