From my experience, the males are kinda wandering about and both sexes are staging in the mouths of creeks and rivers. Some are usually along the mud line (that's the area where the silt and dirt flows out of large or fast creeks into clear lakes.

You can still catch 'em. Crawdad patterns work well during the pre-spawn or pre-pre-spawn. Just a few suggestions. Sinking tip on those crawdads and streamers. I do well on bead head white woolie buggers, White Miller's Streamer, Clousers, white Zonker, Moss Bluff Special and a couple of custom patterns. The Crazydad is a good pattern but I have yet to catch them on it . . . still waiting on some info to respond back to your email, Chuck.