first things first. In the cold water the fish are lethargic and you need to use smaller planer boards. I use the yellow birds in cold water and then go to my Otter Board set up when the water warms. As far as line set ups? I use 10lb mono to a barrel swivel then 10lb florocarbon leader approx 5-6 ft long. My set up is as follows to be specific. First put on the Yellow Bird, then a light conical egg weight (approx 1/4 oz) then barrel swivel followed by florocarbon leader. The option of a snap swivel or tie direct to the lure is up to you. I add the weight due to slow troll speeds of .8 to 1.1 to help the bait get to desired depth. Keep in mind that when a fish strikes the planer board will be pulled in a tugging motion towards the rear of the boat. I run two boards off each side. The outer boards line will go over the inner board and not tangle. As far as long lines it is OK to run 2 but you will need to adjust line length and different depth diving cranks. I do not recommend two long lines (especially in rougher seas) due to the possibility of tangling, but in calm waters with smooth wide turns you should be fine. We have been having our best success on deep diving wonder bread pattern reef runners and the new hot tiger rapalas. Keep in mind the new hot tigers come in both medium and larger. I recommend you get 2 of both sizes. We have been running the reef runners and deep diving rapalas 80' of boards and the mid size rapala 100'.

Hope this helps

Good luck and Good Fishing