Apologies for the rather late reply:
I reside in the Tip of the Mitt in Northern Michigan and have knowledge on the Alabama Gulf Coast as well, both where overall population is pretty much limited to the tourist season in mid-summer. I have documented some roadways along the Alabama and Florida Gulf Coast, but have not been there lately to add much-needed updates to SR-182 and 59 (following reconstruction).
I would be most comfortable starting a new guide for US-31, I-75, and other major N. Michigan highways. None exist yet so that's why I'm wondering if there's special permission/trustworthiness in order to do it.