We just returned from a nice trip to Merritt Reservoir SRA in the sand hills near Valentine, NE. This is the second time this season we've needed 4x4 to pull the Momentum. The CG road at Cedar Bay goes down a hill, bottoms out in thick bed of sand and climbs again. The dually just couldn't get the footing to pull the rig through that mess so I shifted into 4x4 and uphill we went.