I would drive south for 1-1/2 days, stay for 3 then head home. Hopefully that will get you into some decent weather, say around Nashville, TN. Of course if you are tied to the March 8-15 time period, you may have to cancel the entire trip if the weather forcast turns bad. March can have some pretty spectacular snow storms. Good luck and hope it works out for you.
2012 Eagle Super Lite HT 26.5RKS
2005 GMC 2500 SLT HD D/A