if the lake is new to you it might be a chore , struggling on new waters is pretty common , if you know the lake frequent areas that have produced fish in the past at this time of year , LS is great if you are on fish to be sure , but as we all know it isn't exactly the silver bullet that killed the werewolf
as stated above the roamers are sometimes quite difficult to chase down and often seem highly reluctant to bite for whatever reason .
water temp might be the answer , look at it closely as you search , sometimes 4 to 5 degrees warmer than the rest of the water this time of year will be holding lots of post spawn and pre spawn and actually spawning fish . if your waters are real clear ,you best stay back off them unless the water depth is extreme , they tend to scatter like cock roaches when the lights come on if you roll up on top of them and they can see you ....
time of day might come into play as well , early this time of year and late brings fish into the mode to move into areas that they might not have been in midday .
beyond all that , you could always ask around locally , some folks might point you in the right direction at the spot you are visiting , it could happen ...