Overlander High clearance only!
This BLM road just leaves the Interstate in the west bound lanes..there is a 4" drop off from pavement and then a steep short dip. NO RVS OR TRAILERS OR LONG WHEEL BASE VANS recommended! The BLM road goes into the wilderness as a "cherry- stem" and vehicles are allowed. However the wilderness buffer along the road looks to be only about 50 ft total so very limited camping until you get into the Big Horn pond area (3.5-4 miles). Road is rocky high clearance and sandy in spots and gets rougher as you go in farther. 4x4 is nice to have.
Note that the exit from the interstate is very risky and EXTREME Caution is advised...check your rear before you slow down to lv the interstate pavement. Same risk when you return to the pavement...extreme caution is advised as the interstate traffic cannot see you and do not expect vehicles from the side access.
Great cell signal and a cool primitive road bounded by wilderness makes this road an Overlander dream camping area, imo.