I've been told by a number of NV hunters that there are NO coyotes left in the entire state, so you may as well not even try, LOL.
Seriously, I called in a pair a couple of weeks ago, within a 1/2 mi of the rest area on I-80 just west of Emigrant Pass (mile marker 256 or so), and have gotten very good responses to howling in the Carlin area.
The pair I called in are still there, LOL, I don't carry a rifle on my truck and so, on those rare occasions when I can find the time, and a suitable location I can get near with a big truck, I "reward" them with a can of cat food (cheap) so as not to make them call shy for others.
I usually have to be satisfied with just "talking" to them. They don't seem to be too eager to get close to a parking lot with big trucks driving around in it, for some strange reason.
"Government is not a solution to our problem, government is the problem." Ronald Reagan.
"Americans have the right and advantage of being armed-unlike the citizens of other countries whose governments are afraid to trust the people with arms." James Madison