We have started tapping maple and black walnut trees! We just bought the house next to us (Needs a LOT of cleaning up, but will make a good farm house/ possible market/ house for my grandmother to live in one day), and it comes with a bit
of property with lots of black walnut trees on in! There is even one that we needed two ratchet straps just to go around the tree! It is VERY big, and we might need more than one bucket for it. Here is a picture of a normal maple tree that we tapped:
We have tapped the maple trees at the driveway, in the back woods, and next to the east side of the river. That is AROUND 40 maple trees.