When the water gets really warm and all the beds are empty I start dredging. The fish all seem to stay deep and won't investigate a fly on top. That's when I use something heavy with a lot of legs. I drag it across the bottom feeling every rock and stump. The strikes vary from slight resistance to a super hard yank. The really vicious strikes almost pull the rod out of your hands. I find the fish aren't as plentiful but the ones you manage to hook are a nice size.