Awesome- glad you liked it there! The left side sees plenty of use, though not as regular as the right. The rainy season really did a number on the Pit this year, lots of washouts. They're planning to fix the jumps and pump track and seal them with a special clay. The ABA is also working towards putting a national-level BMX track over there, I think in that field just outside the pit.
Per the sign outside the fence to the Pit- helmets are required to ride there, and full-face helmets are recomended. The agency to which the land belongs has said on no uncertain terms that the area will be bulldozed the first time someone gets hurt out there while not wearing a helmet.