Ft Stockton to Big Bend then Alamogordo to Carlsbad? Route?

No big mountains. The 285 south of Carlsbad is beat up by the drill trucks. 285 to the relief route in Roswell to the 70 is a good road. I run over the hill to Alamogordo all of the time. A tougher hill is the 70 from White Sands Missile Range to Las Cruces, just take your time!!