Hey Erez,
Congratz on doing your first snow camping trip this year. I also jumped into winter camping this year and found it amazing to be able to go out all year round.
I’m in SoCal so I’ve been going to San Gorgonio, San Jacinto, Cucamonga, etc. Also plenty of camping in Sequoia such as the Lakes Trail. Mount Whitney can also be good winter camping. The issue with the Sierras is that most roads are closed due to snow and rockfall. You’ll have to find a trail where the road isn’t closed very far from the trailhead.
I hope others can jump in and report in on more local winter camp spots.
@wanglethewild on ig