Silica packets that come in medicine bottles or packs of beef jerky will help keep the moisture out of it. If you have alot of ginseng you can make your own by picking up some \"water saving crystals\" in the garden section at Walmart, it's the same stuff.
always try to keep as much air to it as possible and away from any moisture a big box or large paper bag works best.
If you see your going to keep it long term put it in a paper sack and roll the top down and put it in the freezer.
thats the way i do it ..... to each his own