I used to have a horse named Natchez Trace. It's funny to me to imagine being afraid there - back in the days before cell phones, that part of the country was the sort of place you get help within minutes when you break down. Good ol' boys are good for that at least.
Diane, there were yearly outbreaks of yellow fever but the big year was 1878. Memphis became a taxing district. Basically everyone who wasn't poor, and some of the poor, fled and came back later - there were refugee camps for the poor who tried to flee. We have mass graves from the epidemic, and several Episcopal nuns who died nursing the sick have their own feast day in the church to commemorate their sacrifice. General Hood and his wife died of yellow fever that year in New Orleans, leaving ten orphans.
Jefferson Davis was a frequent visitor to Memphis after the war - if I recall, his son lived here? There was a park named after him until recently, and lots of the early literature surrounding the Memphis Carnival hyped his involvement.
Re: using Forrest. My observation of Forrest is that he was completely intolerant of people he felt were dumber than himself. That's not a laudable quality in a subordinate commander. For one thing, his judgement about other people's relative intelligence was not 100%, and for another sometimes even a dumb plan works if everyone gets behind it. But no plan works if the person appointed to carry it out half-***** it because he thinks it's stupid, waits until things start to go sour and then throws up his hands in frustration and breaks off to do what he wanted to do instead. Most of Forrest's failures seem to follow this pattern, while his successes tend to be times when he had no one telling him what to do. Jefferson Davis and his half-baked notions of himself as Interferer-in-Chief plus Forrest in close contact seems likely to have resulted in murder. It's just as well he didn't make more use of him.