Totally. Personally I have gotten sick from it so I'm just working with what works for me personally.
That sauna sounds cool!
Discussion
It will be really cold...
And do what you need to do to stay healthy!
I believe the cold exposure directly causing sickness may be old science or one of many other variables at play. Obviously it is still prudent to avoid hypothermia.
My main intent is to raise dopamine, and encourage efficient mitochondrial processes. Here’s a great scientific resource if interested: https://www.hubermanlab.com/newsletter/the-science-and-use-of-cold-exposure-for-health-and-performance 