I have been tracking that for over a year now. Also using the basis.
GSR of the Basis is way to variable to find correlations, peaks in GSR says way more about stress than the actual level does, so be careful with yur interpretations. If you plan to analyze it. you may consider dividing GSR in categories " low-middle-high" and then look for differences. I managed to find a correlation there with stress.
For skin temperature, there will be now (or really small correlation) skin temperature is mostly influenced by weather temperature, if you can control for this, than maybe you can find something.
I have been using Taplog app and rate my stress, productivity, activity etc. every day with a 1-10 rating. Very easy to export