Temp should be easy to keep once you find the right place to have your bator, in the house, or garage, where ever you are incubating. Humidity..makes a difference in the area that you live. I am in the desert. I have to really add water to get humidity up for lock down..don't worry too much for incubation, but keep it around high 20's and low 30's. Have to add sponges along with full wells to get to 60 .. 62%, where some, like those that live in Florida for example, have no problems getting that humidity where it needs to be lock down. May have a problem keeping it down during incubation though. 
I also brag to my DH2B and Mom every day about all of you and give them the play by play. My first hatch I wasn't in a hatch-a-long and even with my Mom and DH2B I felt very alone, as this is mostly my thing. Don't get me wrong they get excited and want to see too, but mostly they just come tell me if the humidity goes down that sort of thing. I did tons of research about hatching and since we decided to get chickens I've been reading non-stop just about lol I still wasn't prepared. I had read about assisted hatches but didn't think I'd have to do it and I was home alone when I did. I was on BYC but I hadn't joined yet so I was just silently searching for help that applied to my situation. I found it. I was putting off joining BC I didn't want it to monopolize my time. DH2B still gets a bit jealous of you all, like I'd run away with you.... Maybe your chickens. 
