If you're going to troll out in the open lakes you'll need a downrigger, don't think there's much to catch at the depths any lure travels at unless you're in fairly shallow water
. Except maybe if you're out there first thing in the spring before a thermocline has developed. That's been my experience anyway. You can get downriggers that are removable and mount in a variety of ways. For lures it depends on species, time of year, water
clarity and temperature and what kind of bait fish
they are eating, local knowledge type of thing.
We never troll, only dunk a line after the hook's down and in our area we usually get success with just a worm, success in this case being a nice walleye. I bet you would get better luck with this question on a fishing