The complicated logistics of traveling in the region and the dearth of facilities and infrastructure mean that this is one place where a package tour might make sense. But you can rest assured you won't see any mega-tour buses trundling along the canyon's dirt roads. From the United States, the oldest operator in the area is Pan American Tours (800/876-3942www.panamericantours.com). Prices for three- to seven-night tours range from $480 to $875 per person. The California Native (800/926-1140www.calnative.com) runs small group tours through the canyons. The 4- to 11-day self-guided trips start around $720; group trips last one to two weeks and begin at $1,940. Copper Canyon Adventures (698/893-0915 in El Fuerte, 800/530-8828www.coppercanyonadventures.com) offers private and group tours ranging from sedate to adventurous. 3 Amigos (635/456-0179 or 635/456-0036www.amigos3.com) will plan tours based on your specific schedule, needs, and interests.->