In June I did the Springer to Neel Gap. I planned (and did) 8-10 mile days because I'm 68 yrs old and had rather saunter than hike. Your feet are the part of you that will send you messages if you haven't hiked in your hiking shoes carrying a pack the approximate weight you'll be carrying on your trip. This whole Georgia section (as well as all of the AT) should be enjoyed. Hike your own hike. Park your car at the end of your hike and get shuttled back to Springer or Amicalola Falls, then you won't feel so much pressure to get to the end of your hike at a certain time. Don't over pack your pack. There is water at every shelter and Lance Creek, but plan well during the day because there are stretches that will be dry this time of year. Plan to take a break at Mtn Crossings--it's a neat place that has seen lots of history. Soak in your experience and have fun.