I do a lot of trout fishing (mostly fly fishing) in north Georgia, including Blue Ridge. Will you be wading? bank fishing? using a boat/tube?
The Toccoa river is a popular spot, stocked and has plenty of fish though sometimes a bit tougher to catch. If you wade, be very careful, the rocks can be very slippery and they release water from the dam (blue ridge lake) often and sometimes outside of schedule.
Be sure to hit up Unicoi Outfitters (http://www.unicoioutfitters.com/index.shtml)
in downtown Blue Ridge, they are a fly shop but can point you to productive water. They also offer guided fly fishing trips should you desire. They have access to some private water that contains some trophy trout.
What kind of vehicle will you be driving? I can point you to some smaller, more remote streams, but I would not drive a car to some of them (creek crossings, mud, ruts, rocks, etc). I have a jeep, I have no issues getting around. One of my favorite spots requires a creek crossing and I've never seen the water less than 15" deep.
You won't be that far from the southern terminus of the Appalachian Trail. There are a lot of other hiking trails in the area. There are a lot of water falls as well.
Also, there will be some fresh north GA apples for sale at the orchards in July. Apple season starts in June. You can also find other fresh fruits and vegetables and canned goods.
Let me know if you have more questions.