I agree with everything that's been said: My two BPs can be out for quite awhile. They're both grown adults, laid-back and easy-going temperaments.

As for my RTB... she's a fairly large snake and also has a kinked back. I only get her out maybe two or three times a week, but I leave her out for long periods of time. This allows her to get herself oriented (her back gives her problems) and then to stretch out and explore. I pretty much let her have the run of the living room for about an hour or more (all other animals get put away and the room has been checked for places where she could hurt herself---plus, I keep an eye on her. Jo, she likes crawling under the couch, too!).

As a baby, I would give him the inital settling in time, then, after he's eaten for the first time, start by handling him for just a few moments a day. As he settles down (or, if he's generally laid back), you can extend these periods of handling him. As he gets bigger, you probably won't be able to hold him so much as get him out and lay on the floor with him... but, as long as he knows you're not going to hurt him, it's cool (if you have any problems with the handling, I'd get in touch with Clay... he'd be more than willing to help you out with one of his little guys).

Sorry for the long post. Hope this helps!