On Naconiche I never run higher than an idle except in the main lake right by the ramp. the two arms are basically a forest. You'll know when its time to come off plane.
Lake Nac is wide open south of the power lines. North of them is still relatively open but lots of random single widowmakers so i usually just take it slow.
I usually prefer lake Nac because it lines up more with my style of fishing. clear water, lots of grass and pads, docks. Swim jigs and frogs.
Naconiche has a steep bank all the way around and lots of trees and a good bit of grass, no docks. Frogs always work but other than that i usually just have to junk fish.
Both lakes are fun though.