Do a crime and type of crime search. The trend in Oklahoma over the last decade or more is that small town = meth town. Not always, but it's generally the norm. Now you can add pot grow houses to the equation lol.
Or go talk to the county sheriff. My brother's father-in-law was going to buy a place, but his wife made him ask the sheriff about it first. The sheriff said if he bought it, make sure that everything that could be carried off was chained down or else the tweekers would make off with it.