Regarding Horseshoe Meadows...
This from Doug's board
Originally Posted By JanetW
confirmed Sunday 17th that the lower gate is open but the upper one locked. by rights, the upper one should open June 30 when the rest of Inyo Natl forest opens, but... there may be some wiggle room on that.

Originally Posted By Woof
I was up there to day-hike Cottonwood Lake trail on multiple days and noticed folks pitching tents along HSM road, as well as one vehicle parked by the locked gate (to campground) that was still parked in the same spot the next morning when I returned. Official are being cool.