BRBs do need slightly higher humidity than BPs, but not so much that it's hard to keep them. The breeder I spoke to recommended having a humid hide (a box with slightly damp moss or other similar substrate) in the cage. Just mist the substrate in there and you're good to go. Otherwise, space and temp wise they are quite easy to keep. And they can be feisty as babies but tend to mellow out with age, like corns.

As for screen cages... do you mean screen top or ALL screen? If just a screen top, you can use the foil treatment to keep humidity up. Especially up here in the NW.