I got here via link from LongHairCommunity.  I very much enjoyed perusing your pics!  I've been to Lake Conasauga several times, also hiked to the tower on top of Grassy Mtn., which is close by.  You should try the old road to the fire tower, or if you want a long adventurous climb, take the Grassy Mtn. Tower Trail directly from the lake.  Either way gets you to the top of Grassy Mtn. 
 
Happy Hiking,
Amelia