Low-light conditions are definitely best. Look for current breaks- you want some current, but not a lot. They're not strong swimmers.
Livers are popular, but a pain in the butt because they dissolve easily. We use cheddar cheese, night crawlers, BBQ chicken skin, actually about anything smelly will work as long as you get it in front of them.
I haven't found an effective lure for them yet, but I'm still trying. I know some people use them, with some success.
A buddy of mine gets well into five figures most years, and he doesn't have a boat.
Yes, you do have to register before fishing, BUT, the check stations run short hours, and sometimes there's no forms in the self-service boxes when you go to register while the station's closed.
Some of the checkers are sympathetic and understanding if you're a regular and they know you're honest. They know it's sometimes difficult to meet their schedule, since the fish don't keep the same hours as they do.
But if you do break the rules blatantly, they'll ban you, usually permanently. And I've been told that ANY fish/game violations will void your eligibility, at least for that year.