In a non-reactive large bowl, combine the blueberries, ¼ cup sugar and orange juice, tossing gently to mix and set aside.
In a medium bowl, combine the butter, ¾ cup sugar, flour, baking powder, salt and vanilla, then set aside.
Preheat a 12 inch cast iron Dutch oven to bake at 350 degrees (25 total coals = 17 top / 8 bottom).
Pour the blueberry mixture into the pre-heated Dutch oven.
Drop the topping on top of the berries, about 1 tablespoon each and scatter them evenly over the berries.
Bake at 350 degrees covered until the berries are bubbly and the cobbler is cooked through … this will take approximately 40 – 50 minutes. Make sure you turn the oven and lid in opposite directions about ¼ turn every 15 minutes or so for even baking.
Remove the Dutch oven from the coals, uncover it and let this yummy camping blueberry cobbler cool slightly before serving it.
