the deathlcaws are only a problem the first time you play the game and at early levels when you don't have good weapons, but once you get a mutliplas rifle, sniper rifle etc, dealing with them is easy, even a 9mm is pretty good for dealing with cazedores, any high rate of fire weapons works on cazedores and they are only in a few locations, the map area of new vegas ins't very dangerous once you have some good weapons and are about level 15, the game is super easy once you're about level 20, you're like a walking terminator, once you know where the deathclaws and cazedores are, you don't really even need a weapon on 99% of the map area.