Creel is at about 2,300 meters elevation and temperature strongly varies with the season. In Springtime, the time of my visit, it was chilly in the early AM-hours and at night and hot during the day-hours. If you are making excursions at the bottom of the Canyon (such us Batopilas) you are going to get down 1,800 meters to 500 meters elevation where the temperature is remarkably higher than on top of the Canyon and Creel. All in all, during your visit you are likely going to face a huge temperature span during the different days and even in a same day. Bring clothing you can wear on and off in progressive order such as T-shirts, shirts, sweaters and jackets. Bring also a hat or a cap because sun can become aggressive. Finally you are going to need trekking shoes or other outdoor shoes, boots or sneakers. Leave home your moccasin or high-heels shoes as you are not going to use them.
Toiletries and Medical Supplies: There is a pharmacy in Creel's main street but taking your own first-aid medication is a good idea. Bring sunscreen with you.
Miscellaneous: There is an ATM machine in the main street, close to the Main Square, accepting Visa and Mastercard. You don't need to bring too much cash with you.
Toiletries and Medical Supplies: plan on 'Monteczuma's revenge' or diarhea - avoid the tap water and bring antibiotics and immodium.
Photo Equipment: bring a camera or you will be sorry!!
Miscellaneous: if you can, bring gifts for the Tarahumara children, such as pencils, paper, crayons, markers, other school supplies, candy and toothbrush/paste sets.