I do believe it is "Yeehaw!", not "Yeeha!".It places the emphasis on first syllable the way you wrote it, when it should be a protracted yell that sounds more like "YEEEEEHAWWWWW!!!"Being from Montana, I know these things. I may not know much, but I know a little about cowboy calls.
Way to go Matt! Man, seeing this puts the feet to the fire. I need a little prodding to keep plugging away. Glad to have a positive example!
Hey Matt, Good you're writing your book. You're about 33k words ahead of me. But hey, at least I have the outline done. Anyway, I came across this blog. Actually, this guy is the brother-in-law of my dad's cousin. It's something to look forward to anyway. Later.http://smithysbook.blogspot.com/2007/05/plotters.html