RE: Bad set-ups....
As usual, Good Thread Bobgobble..
Down here our land is scattered with creeks, sloughs, backwater and rivers- Just going in to a Gobblin bird, you may cross 4-5 of any of the above obstacles that may seem insignificant to us, but a turkey may not cross any of them reagardless of how hot he's gobblin.. I cant even begin to tell you how many times I've watched a bird hang up at 70yds because he would cross a slough or other water hazard and just stand there strutting and gobblin his head off- One thing to remember is that it's natural for the hen to come to the Gobbler sounding off rather then the other way around, so it doesnt take much to make him hang up just outside of gun range and make you wish you were somewhere else.
Like Bob said, know the land your hunting or your going to have a long an frustrating season.