Didn't see the Tahoe ones but that whole region has been active hasn't it. Makes me wonder if there's something about high altitude lakes specifically - I've been tracking reports around Snowdonia for a few years now and we get a disproportionate amount of sightings near the reservoirs up here compared to elsewhere in Wales.
What direction were the lights moving? That's the thing I always want to know first because the interdimensional angle only really starts to make sense when you rule out conventional stuff, and the movement pattern is usually the quickest way to do that. Were they holding a fixed position at all or continuously moving?
Also what time exactly on Thursday? There's a guy on here who cross-references with aerospace tracking data and he might be able to pull something useful if you can pin down the timestamp.