Unless you have your heart set on walking north, might I suggest starting at Dick's Creek Gap and heading south? The 8 miles from Amicalola to Springer has a lot of uphill and can be pretty intimidating. Also, if you are headed south, you are getting closer to hostels and shuttles that are typically headed into Gainesville for the bus station.
The trail seems a little more forgiving when you are headed south in terms of long uphill stretches. You have Neels Gap and the outfitter at roughly the midpoint no matter which way you go.
The biggest argument for heading north is that you will have plenty of company headed in that direction.