I sure hope you get a nice harvest this coming year, Ken. I guess by March you have consistent warmth in Mississippi. And if you like greens please be sure to try eating some of the vines, they're delish!
Oberlin/Mary...I can't picture the ground in Alaska ever warming up but I've never been there and always picture Alaska as cool or cold. Growing in grow bags is the way to go for you. As for your starts I bet you could buy a sweetpotato or two in the store and grow your own and save some money (instead of buying them online.)
Shoe (really tired of the Winter of 2014 already)
