Green Tree Pythons

Hello! Have a few questions regarding GTPs. I've always found these animals absolutely stunning, and want to learn more about keeping and caring for them, I'll submit my questions in a list to kind of keep things somewhat orderly:

1. What's the best way to tell the locality of a GTP in terms of which "race" it is? My understanding is that their coloration or pattern can vary depending on where they/their parents were originally from.

2. Would you recommend a humidifier attached to a thermostat, or regular daily misting of the enclosure? Is it better to mist the cage for higher humidity during the day and letting it lower throughout the day, or to maintain a steady humidity in the enclosure at all times?

3. Can you handle a GTP on a regular basis? From what I've been reading, most sites I've been to suggest simply admiring them from afar.

4. Are there any GTP owners/breeders in the Northern VA/DC area? I am seeking an opportunity to handle and interact with these awesome snakes to get some experience with them.

Thanks! Looking forward to hearing some responses!

-Rob