Beavz,I have caught a lot of fish out of Lanier longlining. It will take you a while to learn the lake. Right now I am sure they are on brush piles and under docks. The best days to troll on Lanier is cloudy days because your fishing clear water. When things start warming up this spring concentrate on creeks up the Chestatee and on the north end of the Chattahooche.
Wahoo and Little river are good creeks in the spring and yellow jacket also. There will be a lot of fish up above clarks bridge also.
Good Luck