I haven't been out in a while on the BV lakes, so things may have changed, but there was, at least a couple of weeks ago, quite a bit of top water activity on Loch Lomond. Early in the AM.
Usually you'll see a 1/2 dozen boats in the main lake down by the dam, sitting out mid-lake, if that's what you see then the TW bite is still on. The fish are spooky because of the pressure, they won't bite standard stuff like buzz baits, wake baits, etc. You'll have to try small spoons, Kastmaster, crappie jigs, small flukes to see what they want.