In Franklin Parish, Tank Lake is listed as a lake, so I would fish one reachable area before widening the search, so I would let the first area tell me when it is time to move. I would begin around one familiar-looking short stretch instead of trying to cover the whole water, because it gives the first plan a fair chance before you change directions.
Tank Lake Size, Maximum Depth and Volume
A dependable standalone acreage, maximum depth, and storage figure is not published for Tank Lake, and that is a reason to let the actual shoreline set the scope of the trip, so I would avoid building the day around an estimate. I would spend more time learning the shoreline before assuming too much, and I would leave the missing numbers alone instead of borrowing them from another lake.
Fishing This Water
The fishery at Tank Lake is lightly documented, which makes it smarter to wait for actual catches before specializing the tackle, so on the first visit I would keep the tackle broad enough to learn what bites. I would keep things simple with one versatile setup carrying a few small artificials and a bottom rig, because if something starts biting, the rest of the trip can be built around that clue.
A Practical Tank Lake Game Plan
My first plan for Tank Lake would be to fish one straightforward piece of water deliberately and make changes only when the results justify them; a slow start is a reason to make one thoughtful change rather than rebuild the entire tackle plan.
Nearby fishing waters
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Distances are straight-line estimates between mapped water locations.