WILD HEARTS

It doesnt seem to specify the area name as Harugasumi Way on the map. When you get to Giant Tree Trunk camp it wil give you a new option of creating a fire pit or tent by pressing LB+up. You can place 5 fire pits, demolish them then replace them. Doing this six times wil complete the 30 for the achievement

You can place multiple dragon karakuri then delete them and it will count. I simply placed as many firepits I could then deleted them, then it was rinse and repeat.