I have found in my limited experience with Dipsey's and In-line planer boards that mono is just too stretchy...Last weekend I dragged a 2-3 pound Brown around for who knows how long, I realized it was on when I reeled in to change lures. I was using 20# Big game, 120 feet back, 50 feet out on an In-line board. Last year I found that using Dipsey's I couldn't get them to trip and reeling in was a b*tch!
Lew, I agree with Dawg, In-line planers are real easy to use, I like the Churchs Tackle Walleye board. You might even try 'em for Muskie this summer!