Do look good but the yucca - and the joshua - trees were mostly in southern California and western most Arizona and southern most Nevada. Some of the worst desert in North America - think Death Valley area (though a little wider afield than just that). Kind of like Monument Valley so famed from movies, might look pretty but not much happened in such desolate places prior to paved road and reliable automobiles. Just sayin'. Now eastern Arizona and Western New Mexico (or more) had lots going on during the Old West period. And, generally, not nearly so desolate.