I'm definitely newbie (only had snakes for 11 months), especially compared to Dr. Derek here... I was just thinking, since you're into the natural thingee... bp's naturally are anti-social - they stay away from other snakes as far as they can in the wild. So, since it is not much extra work and space to house them separately, then why not, as it is more natural?

We have 3 bp's and a hognose and they're all in separate tanks (I decided against the rack just because I'm still in the mindset that I'd rather do the extra hard work of keeping them in tanks as opposed to the rack because it looks much nicer in my snake room) and so, I stacked 3 of them like they have in the pet store so they don't occupy a lot of space. Besides me not being able to reach the top tank without a ladder (I'm only 5 foot nothing), it really is not much more work than 1 tank (shop vac is my best friend).

This way, they can thermo-regulate properly (since the tank can only have 1 side hot, the other side not hot, they don't have to bully each other on who gets to stay in the hot side while trying to "escape" from the other). I mean, I even go to the extent of having identical hides on each side of the tank (suggestion about this abound in this site) just so the snake doesn't have to forgo security over temperature (one hide feeling more secure than the other, one hide different temperature than the other, so which does the snake choose, security or temperature)...

Anyway, there are several successes on either way, so this is what Dr. Derek and I prefer, it's up to you what you decide given all the facts from the other side of the fence as long as the snakes are well taken cared of.