Check out
www.easterncoyotes.com
There's a guy on there that really knows his stuff. He goes by CCP and even has an outstanding video out. Most the videos you see are from the west, which doesn't help us out much.
To answer your questions. I personally like any kind of bird in distress using a mouth call. Higher pitch and very shrill seems to work better in my area. Chicken is distress, yellowhammer woodpecker, young cottontail, young turkey in distress.
My bread and butter call is a howler. I enjoy talking their language.
I also have better luck from around 10:00 a.m. to dark.
Coyotes are mostly nocturnal when hunting. They usually find something to eat, so by morning their bellies are full and they are ready to take a nap. Up towards noon or better they are starting to get hungry again.
I've been hunting them seriously for a decade now. Shot my last deer in 2000 and switched completely to coyote hunting.
I played around with coyote hunting long before that.
My hunting partner shot his first coyote in Tennessee back in 1973 and he hunts them exclusively. We have a fun time.
They are here in good numbers, but just like anything else, there is a learning curve.