"do you guys ever stop and jig once you get a hit on a trolling pass? what do you use if you do?"

no, but on one of the lakes on the Allagash, a ranger had told us of a "hole" that was deepest part of the lake (this was earl or mid-June - fish were already deep) - how to line up landmarks to get there, then just drop a flutter spoon to bottom and jig it - no bait;  we caught one laker that way in deep water.  didn't spend a whole lot of time there.

something like a Johnson's silver minnow would be my choice - lots of flash for down in deep water