Lefthand/Carnage and Hackett are open pretty much year round. The higher trails won't open up for a while yet.
As for camping there's some trails near Buena Vista that are nice. Hancock Pass and Grizzly Lake are two with some nice camping spots. Most of the high trails have campsites near them somewhere along the way.
1999 TJ Sport w/D44
RE 3" SuperFlex lift, Warn HS9500i Winch, Bulletproof Mfg. FF5 front bumper, Tomken Rear Bumper w/gas cans & spare tire carrier, Tomken Gas Tank & 2x4 Rocker Skids, Tuffy Rear & Side Storage Trunks