How can I predict fog drip on backpacking trips?

Could anyone give some practical steps to estimate the risk?

I found one way by using soundings based on the dewpoint-temperature curve, but this is not very quantitative. Windy also shows the cloud density in the sounding on the vertical axis, does anyone know how this is calculated? It depends on the altitude and is not just the difference between the two curves.

Another method I read about is to look at the lifting condensation level, h_lcl = 125(T-Td) for the valley floor and then check whether the campsite is well below h_lcl. I am not sure whether this is more accurate unless one has values for T and Td at the valley floor during the night, which is highly unlikely. Even if I had T and Td, I might as well observe whether mist forms or not, so this approach is not helpful.

The third option would be to look for low clouds in the Meteogram, but low clouds don't automatically mean fog drip; I have also noticed that in retrospect the Meteogram did not indicate any low clouds, while I was still completely drenched during the night.

Is there any way to make a better prediction? Is it possibly to improve Windy's prediction with a local measurement (maybe measure T and Td with a portable weather instrument and shift the predicted curves in the sounding by these values?)

Is there a way to find the driest location in a given area, without looking at the soundings for individual points?

I am mainly hiking in CA if this helps.