I confirmed that the North Branch Extension gates are open from 8am to 8pm. There are supposed to be Porta-Potties along the walking route, but I didn't see them.
FYI, the north section has that lovely open view across to the main garden & Japanese island, but the southern half is detoured BEHIND the greenhouses and construction, and was very crowded with meandering walkers when I passed through. Silver lining: the road surface is new and smooth!
-Cynthia Karabush
847-722-7871