There are some "rules" in general for the bigheads but lately seems every night is different, especially when your trips are a week apart. In the section of river I've counted on for years the bigheads are really thinning out, damn silvers by the thousands tho. More of an honest hunt these days. Lights....some swear by the towers and do well. We've been out on nights where anything more than the bow lights would keep you seeing much of anything, other nights the fish act as stupid as can be. Last two years havent been good conditions for us, crossing the fingers for the law of averages to be on our side. Anyone wanting a clue if you visit the area please let me know, more than happy to help out.