If you’d stayed the night camping the temperature demands
a jacket at night. Chaco’s elev is 6100+ ft.
For neat reading that includes Chaco I recommend
Tony Hillerman’s “A Thief of Time”.
I wish I could have stayed overnight. I was on my way from Santa Fe to Phoenix. Got up at the crack of dawn (still on east coast time) and drove out...its in the middle of nowhere. Spent most of the day and drove on.
It is certainly on the list of places where I want to spend more time. Its an amazing place.