I would defiantly carry a mouth call also. A moth call is more versatile, plus if you need to coax one that extra 50-100 yards, an e-caller isn't usually the way to do it. I really like having one of the squeezable mouse squeakers with me also. They are only a couple of dollars, and you can either Velcro it, or hold it against the forearm of you gun for those final few seconds of coaxing. One more thing to add is that not all animals respond to the same sounds. I have seen a coyote hunting the far edge of a field and blown a little Johnny Stewart pc-1 cottontail without even stopping his stride, then switching strait to one of my homemade cottontail calls (or vice versa) and watched them come in on a string. If what you have isn’t working it’s nice to have a back up ready.