Here in Nebraska, just north of you, wildflower honey sometimes tends to have off flavors - sort of a bitterness - that woudn't do well in a mead. Having said that, dark honey can make some tasty mead, assuming the off flavors aren't present. The only way to know is to taste it. In my experience, honey sellers at the farmer's markets usually have little sticks to dip in the honey to taste. If it you like the flavor, you'll like the mead.