Hi Brad,
I would love to share what I have learned over the last few months! I've had a couple of very successful hatches and am currently incubating turkey eggs!
1) You can gather the eggs you want to incubate for about 7-10 days. Of course the fresher, the better I would think, and I try to set eggs in the incubator within about 5 days of laying. Store them where they will remain cool. I use the window AC room. I don't put my eggs for the incubator in the refrigerator. Gently turn the eggs, rotate, just move them around a bit each day.
2) When you have your desired number of eggs, place them all in the incubator at the same time. The average hatching time is 21 days, but both of my hatches came early (days 19 and 20) Have your incubator already stable at around 100 degrees. The temp will drop a bit when you first put the eggs in.
3) I keep my temperature around 100-101 and I do not use a fan either (still air) If you have a fan to circulate the air, you can keep your temperature a bit lower, 99.5. I have multiple thermometers in my homemade incubator (styrofoam cooler and a lightbulb!) They all run just a slight bit different so I just sort of estimate the temp. based on the four thermometers.
4) I keep my humidity around 35-45% during days 1-15. On day 15, I gradually begin to increase the humidity so that by day 18 (lockdown) my humidity is around 65-70%.
5) Turn your eggs several times a day, 3 times is good. I'm turning my turkey eggs more often.
6) Sometime around the middle of the incubation, you might experience some temperature spikes. This happens when the chicks begin to generate their own body heat. I use the room temperature to help stabilize. The room with the AC helps here again.
6) Lockdown is on day 18. Stop turning the eggs, bump up the humidity, and don't open the incubator until the babies have hatched. There are many creative ways to increase the humidity.
7) Here is a thread about incubators. I was really enthusiastic about sharing my set up lol
https://www.backyardchickens.com/t/690760/incubator#post_9360844
Brad, I doubt it matters what season you incubate. Just keep in mind that the little babies need heat, so they will be requiring more assistance from you for this if you are breeding in the winter.
Good luck. Its fun
