If you are going out targeting just coyotes, specifically, then expect a lot of nights of nothing happening when you are first starting out. The worst thing you can do is watch those boys out west blowing any call or playing any sound and have 5 run in. It just doesn't happen like that here in PA. Sure, a coyote is a coyote, but our terrain and everything about it is completely different than put there.
Start out with some low volume bunny or rodents every set. Pup distress works well any time of the year. Coyote vocals work well all year to at least locate them. Grey fox distress sounds have killed just as many yotes for me as any other sound.