Killdeer
It really doesnt need to be expensive to get started. You allready own the right Clothing from your deer hunting. Some dark coveralls and a facemask & gloves Will work but you definitely need to get settled into the brush where your outline Is broken.
Your vehical needs to be out of sight.
Your nose need to be pointing into the wind.
You need good visibility to your right and left because the yotes are going to try to Circle downwind of you. I prefer a more open area on one side with an acceptable Shooting lane on the other.
Try to look at everything in particular and nothing in general. You will be surprised At how quickly you will be able to pickup motion. IF/When you move your head, pretend like you have a stiff neck.
Those yotes can be seen literally running on their bellies now & again. A lot of times they are making short dashes from cover to cover. I take them frequently in between these dashes when they look up out of a piece of cover that you would swear Wouldnt hold a rabbit.
You should be able to purchase a call locally. Try a mouth call first but also get one with an instructional cassette/CD. Look for a cottontail squaller but dont discount the howler calls.