Jeff,
These guys can breed any time of year as long as you cycle them and so I decided to put mine together and try it out. There's been plenty of copulation except with my biak girl. I've had 3 different males with her and Tre is the only one that hasn't had her staying on the bottom of the cage for a week. No copulation, but at least she's moving around in there. I'm raising the temps back up now and I'll remove all the males. I may cycle the biak again at some point and try again with her. She's the one I really wanted to breed in the first place!
Stormy: I'll answer for T. Bill since I'm already writing here. No, the red ones turn green as well, although red is known for some of the more amazing colors like blue.Depending upon the parents, his red one will most likely turn green with blue markings like most.
As far as handling, not all Green trees are handleable. My biak girl is pure wicked and it also stresses her out very much when you handle her. She will ground herself for several days afterward. My Sorongs are all dog tame and anyone can hold them. My Aru girl is pretty good. My Aru male is so-so but has bitten the crap out of my husband while I was holding him. My Jayapura is tame. My OS male is wicked as is my tri-color male.I wouldn't say that they are all tame snakes or that even if you can handle them, that they tolerate it as well as a cornsnake. Fuego never bites, but she will ground herself for days after you take her out. This tells me she's excessively stressed. I would never have people hold her on display. Tempest yes. She's the most laid back snake ever!