The Flame in the Flood

This requires you to wear a full Bear Hide set at the same time. In the campaign, bears start popping up at region 8.

For the full kit (5 clothing items)
- Steel knife (Requires workbench): Boar Hide + 2 Nuts n Bolts
- Metal hammer (Requires workbench): 3 Nuts n Bolts + Old Lumber
- 7 Leather kits (Requires workbench & Metal hammer): Rabbit pelt + Nuts n Bolts
- 6 Bear pelts
- 5 Stitching kits: Hook + Fishing line

Killing bears
The easiest method is placing a few Spear traps between you and the bear and shoot it with a few arrows, which will taunt it to run into the traps. You'll need four hits in total of arrows or traps to bring down a bear.

Killing rabbits
Use either bow & arrow or place a trap right over a rabbit hole then scare the rabbits back to their hole. Rabbits go to sleep at night, but they can usually be force spawned at their rabbit holes by sleeping at a shelter. Just place a trap over a hole and sleep an hour and you might catch something.

Workbenches
Workbenches can be found scattered about the islands, but there's ALWAYS a workbench at the Hardware store islands, which has an icon of a house with a hammer above it.

This is perfectly doable in the same playthrough as though it will require a LOT of scrounging.