Nov/Dec tends to seem to be our hit or miss months out west...
You just have to switch up calls...I use a 3 strikes rule...I call a stand 3 times the same way...if nothing shows time to switch up ONE thing...sub in a new call, call longer, louder, etc...then call 3 more stands that way when they show up you'll know what call/sequence and you'll lock back in on them...