I have been on about every route between LHC and DV. I didn't like the Kelso route the time I went because the road between Kelso and I-15 was very poor. Another route that isn't too bad is up US95 to Searchlight then Nipton Rd to I-15 then west to Baker and north on CA127 to CA190 into DV.
Dennis
2012 Monaco Knight 36PFT
2019 Jeep Grand Cherokee Overland
2005 Jeep Wrangler Unlimited Rubicon on 2007 16' Car Trailer