As another NorCal diver here, wanted to also toss in my thoughts. Echo Lake and Jenkinson Lake are great options (Echo especially as its clear and there are a TON of fish to see). I'm only an hour and 15 minutes away from Tahoe and my dive buddy and I are always looking for more dive family around the area too. We were talking about hitting up Union Valley, Ice House and Loon lake this summer. I'd say we all make some plans and hit it all up as a group if anyone is up for that.