Actually your only adding many many assumptions. Most of which are not acurate at all.
Like harst winters. Hmmmmmmmmmmmmm On our site, we find snakes active year a round, every month. Its at 6000 ft.
With the montane rattlesnakes, we find gravid females out and active every month of the year. In fact, far more active in winter then in our harsh arse summer. Until the rains.
The period from mid may to mid july has the least amount of surface activity. Which is what you folks call active. The reality is they are active in the ground year around as well.
I late dec, I narrated a day in the field on another forum. That day, had a high of 42F air temp. Which is pretty much meaningless.
The hottest surface temps were 128F, The areas the snakes were active in, had surface temps between 75 and 100F, with the crawling snakes using the cooler areas. AGain a normal winters day.
Of course if it snows that day, and would not come up. And there was snow on the ground that day. But it was sunny which is very normal in our "harsh" winters. There are pyros on are study site.
Any way, what I am doing is offering you a report, of what was seen in the field.
A report, whats required in the field is to NOT make assumptions and do not prejudice data. That is, do not think you know anything. Thats a hard lesson to learn. And it does not come easily.
The truth is, your making assumptions based on what you think about them in boxes and applying it to what you think occurs in nature. Which makes your thoughts both assumptions and prejudiced. No offense.
As you already should know, I work from the field to captivity, not visa versa.
The thing about your incubating/nesting temps is, who cares if they do that in nature if IT WORKS WELL FOR YOU.
If it doesn't work well, then use what they naturally do as a guide.
What I make comments to here is when someone has a problem. For instance a surpressed immune system. Or nesting problems that can easily be avoided.
or even social problems where folks cannot keep adult kingsnakes in pairs or groups. These things can all be overcome by understanding what the animals do.
For instance I was at the local feed store and they had a problem male rabbit. Then a rabbit breeder came in and said. If you raise males together, they do not fight. But if you add a female, you could have problems. Or once you seperate them, then reintroduce them you may have problems. Hmmmmmmmmmmmm yup, exactly like reptiles. I laughed.