The key in my experience is to keep transactions small and uninteresting. Don't do $50,000 a month in one transaction. Break it up into $100.24 to $527.43 type transactions daily across 5 or 6 bank accounts.
Good idea, I suppose it would only come to light that way if you were actually in the bank applying for a mortgage or loan etc. Otherwise they shouldn't ever be aware/interested in the traffic (Money In/out vs Declared income) of your accounts