Mojave is a desert, it would be pretty open. If you really want to "stalk" NPC, I suggest you play those games
the game has sniper rifles, silencers, mines etc plus a sneak skill along with stealth perks so fallout is that type of game thats an element of combat, stealth and sneaking, its obsdian that doesn't make fallout like that, bethesda makes games fairly combat oriented, i spent countless hours in FO3 stalking enemies in the dc ruins, sniping, laying mines and in all the dungeons. and even though new vegas is a desert, it could of had a lot more buildings, towns and better terrain for that element in the game , there wasn't any cover anywhere really, so not using artistic license to make the game challenging, interesting and fun and to not make use of all the weapons, perks and skills in the game is stupid and i won't be buying any more dlc for new vegas cause its boring after a couple playthrus, and i probably won't buy any obsidian games because of the lack of quality combat.