Pretty sure all the Campgrounds along Gold Lake HWY are closed By Sept 30 or Oct17 were you able to confirm?
I was at Packsaddle a few weeks ago for Labor Day. It has a hand pump well. I don't think "they" can lock that up. Diablo CG also on Packer Lake Rd has a small creek running through it that still has water in it. You can always filter the lake water too.
Lots of fun dirt riding around there too.