If you get SAFEPAY as a GS09 on an Army base you have it made. There is only 2 bases that medics are GS 09: Ft Leonard Wood, and 1 other one (that I can't think of right now). About 4 or 5 are GS 08.
I work on an Army Base in the West, and we are in the process of being bumped from 07 to 08's. (which is a royal pain in the rear, we have to reapply for our jobs).
Ft. Benning should be busy, since it is a larger (people wise) base; you may or may not end up in the ED on down times (some bases do, some don't).
You may end up with a lot of off base transfers for civilians from the base hospital; most bases do.
Ours are all off base transports, but we don't have a hospital. Ours is also extremely slow, but we are on the largest military base in the US, but least populated base (both living and working). We are lucky if we have 1 patient transport per week spread across all crews. That includes off base runs. We cover an area about 40 x 80 miles (on and off base). Closest hospital is 42 miles from main gate, and level II is 78 miles and level I is 88 miles.
Helicopter may be 30-45 minutes away.