Do we need to wait after 30 days after first bank deposit to DWolla for Dwolla to be able to deposit to CampBX?
From my own experience yes, but my 30 days will be up in just a few more days. I deposited some BTC to campbx to test their system and I successfully bought and sold. I have yet to try a withdrawal but I do not expect any problems. If I run into some I will edit/report back.
As others have mentioned liquidity appears low but do try to throw a few coins at the orders which sit in the dark pool, covering a wide spread it seems. I have profitably bought and sold small amounts of BTC into the dark pool orders.