The short route from FS 42 is about 35 miles from Amicalola State Park. You could get detailed directions from the ranger station in Amicalola State Park. Also some updates... still no fee for the parking area in FS 42, but the state park entrance is now $3.
11/2015 - Warnings are currently posted at the summit of Springer, discouraging camping at the summit due to bear activity and environmental degradation. Recommended camping is at the Shelter, approx. 1/4 mi. N of the summit where there are about 10 level camping spots and a water source.