We are planning to take a guided jeep tour of Canyon de Chelly in early May...thanks to the advice of TA. On that day, we will be coming from Santa Fe. Mapquest says that it will take 4 hours and 40 minutes ...but, realistically, it will probably be closer to 6 hours depending on traffic, road conditions and stops. That would get us to CDC about 2-2:30 pm We are hoping to take the tour starting about that time or slightly later. Hopefully, I will be able to set a tour up at that time prior to our arrival. My question though is ....is it safe to drive the 77 miles on rt 191 from Chinle to Chambers on I 40 to stay the night. The price of the hotel in chambers is less then 1/2 the price of trying to stay in any of the three hotels in Chinle. I'm not sure when sunset is in early May and if we would be driving in the dark...which I do not think that I want to do. Any advice would be much appreciated.