mkirsch, I agree about not camping on private property without permission. That being said, much of the West is public land...USFS, BLM, state etc. Maps show if it is public land.
You may find this interesting regarding Western public land:
https://www.bing.com/images/search?view=detailV2&id=8451CC6911C21D59770BF718B7845FF9FDB2E483&thid=OIP.qvLdI_dnNOTeZaAJOY1-WwHaE8&mediaurl=https%3A%2F%2Fwww.hcn.org%2Fissues%2F46.18%2Fwestern-states-eye-federal-lands-again%2Ffederallandmap-jpg%2F%40%40images%2F6fe8e815-faf6-44c8-9a6f-c375c4ab1ad9.jpeg&exph=512&expw=768&q=western+states+public+land+map&selectedindex=5&ajaxhist=0&vt=0&eim=1,2,6