I mainly longline all i can, and whenever. problem for me is there are only 2 lakes near me with any room to do it, but it works.The main problem you will have is not enough constant speed to stay at correct depth. you will need to rig up with various weights to find out what might work. i know that in my case the best speed is between .7 mph and someetimes 1.0, start out with 1/64th jig heads and throw about 40ft behind boat, only 1 jig per rod. check your depth. if you see the rod bouncing like jig is dragging bottom, reel in line until it stops bouncing. this might work for you in depths up tp about 8ft. as you go into deeper water change jig weights up and distance back from boat. closer behind the boat equals not as much weight. My thought is tightline would be better for your situation. you can also use slipcorks and adjust depth you want, just cant troll as many rods. thing is . with longlining you keep adjusting colors size and depth and you wll hit on perfect combos. i have fished 7 rods at a time on back of my boat and had all of them hooked up many times. it is a fun day on the water. dont give up, just keep on trying. my preference is curly tail grubs. i now have to fish tidal rivers and that is a whole different ballgame, but i can tell you that i have adapted to them and now catch plenty of crappie, longlining in special areas. i have had days on jordan lake and randleman when i have caught 300 fish, only keep enoughh for me and wife to eat. never keep a big female. the above is just my method there are many on main forum, and they all work. remember to keep jigs from hitting bottom, crappie are always looking above them.