Zach,
If you plan to call Iowa coyote. You should set-up within range of "cover" [timber specifically]. As most often they are in or adjacent or heading towards cover, during early daylight hrs.
Trying to call them across open cropland. Is easier said than done.
Also be aware Iowa coyotes spend most of their time. Near the middle portions of 1-square mile sections. I suspect, they are more at ease there.
Most Iowa coyotes bed for the day. Either pre-Sunrise & or the early am hrs. Being 10-11:00 generally is the latest, other wise most are already bedded for the day. Some stragglers, finishing up the previous night's hunt around 11:00 early the next day.
I have "rarely" seen coyotes on the move past 11-12:00 the next day.
Roughly 90% of the time, they'll choose to bed in some sort of cover[timber, grassy draws/valleys & or grassy/brushy creeks]. Over bedding out on the open cropland.
They have excellent abilities such as, hearing seeing & scenting. Stay quite, stay hidden on the way to your stand & watch your down-wind.
You walk into a potential stand from the down-wind side. You stand a good chance of being seen from long range. As when a coyote beds down, they face the down-wind area. They mostly rest, as compared to a true "sleep". Often raising their head to pan around to their down-wind area.