It's definitely doable, although if you wanted to use Superchargers you'd have to go way out of your way, almost tripling the distance. If you haven't already, check out plugshare.com and evtripplanner.com, very useful planning tools. Plugshare particularly in this case as it provides info for non-tesla chargers. I would roughly estimate you'd be looking at about a 10 hour drive going the direct route, allowing 7 hours of driving time and 3 hours of charging time, stopping in Springfield MO where there's some Tesla wall chargers available, looks like an 80amp one at Houlihans which would get you about 60miles or range per hour, so you would probably need to stay for a couple hours. Then on to St. Michael's Nursery in West Plains, MO (you would want to call ahead first and make sure it's available). It's only a 50amp charger, so about 29miles per hour I think, again would need to hang out for a while, then on to Southaven. It's a bit more of an adventure in areas like this not served by superchargers, but you could do it!