I was in Idaho a couple of weeks ago and used two calls, I used an ELK cow call, you bite it and blow, easy to use, the outfitter also recommeneded hoochie mama's which is what he was using to call in my bull

After I got the bull, I got a Power Bugle cause I wanted to try bugling. Got in one afternoon and read the directions, next morning called in a small bull. Was very easy to use. I couldn't chuckle with it, but had some success getting the deep roar by changing the position of my bottom lip at the end of the bugle, but about 1/2 the time it didn't work right. The outfitter used one but preferred his diaphram, but his son is awesome with one.

--Bob