Find the right coyotes at the right time of year, and you'll have action!
I do feel it would be wise to consider if you have houndsmen in your are running the coyotes with trailhounds. That tends to make them not want to engage a dog, especially in the daytime, IMHO. These guys use trailhounds, not sighthounds where a coyote can duck for cover and lose them. So the races are long and the coyotes tend to not forget the negative association with a dog in their vicinity.
I had some guys start running in my calling area last year, and the coyotes reaction to my dog on stand went to complete chit. Called in about a dozen coyotes in the day (thats ALOT for here) and every dang one I saw turned inside out soon as the dog took a single step toward them. Not blaming the houndsmen, I have friends who run and can appreciate the sport, just sharing how it is in my area now. Still hope I can get a few to play this year!
I've also taken my cur at night a few times when he was a pup, but it has gotten hairy, VERY quick. I could not reasonably control the situation alone with dog, ecollar remote, light, gun & caller at the same time. And after the dog got in the woods with a bunch of coyotes, things got crazy. I've actually had to go running into the woods to scare off a pack of coyotes that had my pup bayed up & surrounded. I chit you not. "Toning" back doesn't work if your dog is bayed up!
Now that he's fully mature, I have alot more confidence in him handling himself, but the thought of 3-6 40+ lb. coyotes against a 48 lb. cur is still not good odds. Guys out west running 45-90 lb. dogs on 20-25 lb. coyotes might not fully appreciate the gravity of that potential situation.
I reckon your Ohio coyotes might get pretty big, too, so if ya do try it, BE CAREFUL.
Our coyotes here are larger & more pack oriented, so when the action heats up, your dog will be dealing with a much more formidable adversary! And too gritty a dog will wind up in the hole you'll have to dig to put what's left of him. I hunt for FUN, so I err on the side of caution with my dog.
Here's a body size comparison of my cur to an adult male he decoyed in PA last August:
you can see the same correlation to 1758's photos above of his KY coyotes!
That's my $.02, and prolly ain't worth 1/2 that on the street
good luck & have fun!