Seems like boondocking is the way to go during covid. Went several miles on rough, washboard NFS roads to our campsite. Kept it in four wheel high until we were back on the highway after, then back to...
Plenty of slippage where I was. I like to use 4wd when I can, just so I know it's working when I really need it. (Maybe I did find a problem this time) I also don't wish to contribute to the washboarding by spinning wheels. Under 10k on the truck. I could feel the vibration in the wheel and seat, and it was audible as well. Wishing to get home in a timely manner, I resisted the urge to try 4wd or manually locking the hubs on pavement on the way back. I will do so when time allows.