Again I'll state that the Missouri Attorney Generals web site is clearly referring to which states honor MISSOURI'S carry permits, not the other way around. In my OP I referred to the fact I contacted the AG's office (and got their phone number from this web site) and spoke to the assistant AG himself. He confirmed that yes, Missouri honors Iowa permits, even though Iowa doesn't honor theirs (yet). Also the Highway patrol confirmed this, as does the Iowacarry web site. Don't want to beat a dead horse here, but I did my homework.
Also. yes, Iowa permits are good in every county in the state. I've had one for 25 years, and this has always been the case.
Now, off to church.