IIRC 4wheeler magazine a decade or so ago, took a rwd LS equiped rig across the Rubicon trailer. THey made it with out too many issues. I do seem to recall it may have been a 4x that they choose not to lock the front, ut could be remembering wrong......I can hardly remember yesterday sometimes, much less an article from a decade ago......
So rwd with the proper driver, TIRES for the task, can get places just fine in some instances. 4wd a bit better some times, worst others......4lo is nice. BUT with manufactures finally putting decent low first gears in autos, 4lo is not needed as much to keep tranny temps low. That is what I miss about having 4lo/4wd with my c2500. A way the heck too tall first and reverse, gets me stalled where as I have the HP/torque, just not in a manner that I can use to get the tires to turn at times........
Choose you poison for how you drive.
Marty