If you can afford electric cranks on a DR, it'll save some effort. I was cranking a heavy ball up from 80 feet a lot yesterday, and it's a workout. I hang some bling off the balls, yesterday had a gang troll on one and a big chrome flasher on the other, and did well wth setbacks of 20-30 ft.
At dawn the fish may be shallower. When I started yesterday it was overcast with a breeze and the first hits I could get were at 65+, then when the wind stopped and the sun came out they dropped to 80. Later when the next thunderstorm approached, blocked the sun, and kicked up some chop the fish came back up to 72-75. If I fished at dawn I'd start by trolling 30ish then keep working down in 5 ft depths until they start hitting (easier with 2 DRs, start at 30 and 35, and every 10 minutes drop one down 10 ft). The flashers that worked for me were Luhr Jensen's, dimpled chrome, 5 and 8 inches, mild action. Late in the day a pink kokanee killer really lit their fire. If I didn't get forced off the lake from a nasty thunderstorm I could have kept cranking them in as fast as I could reset, reel, net, and repeat.
When things were quiet enough I also ran a planer board 70 back and 50 out, with an ounce of lead on thin braid line and red wedding ring, but no hits.