I’ve been spending a little time looking at the websites for each of the RAGBRAI overnight towns starting with Glenwood and finishing with Davenport, neither of which are necessarily overnight towns depending on your plans, especially Davenport at the end. I will be staying in Glenwood and not in Davenport. Some of the town websites have a lot of RAGBRAI content, some not so much.
GLENWOOD 
There’s not so much as yet but I am impressed that they list the venue for RAGBRAI as the “Entire town of Glenwood.”
ATLANTIC
Ten years since the last RAGBRAI and it seems they want us back.
CARROLL
They’ve got a nice RAGBRAI header (among several others) and a nice little website! Looks like a great place.
BOONE
Boone has a whole website devoted to RAGBRAI – good on them!
ALTOONA
Nothing particularly RAGBRAI-ish yet though they do have a bicycle on a little badge encouraging “A healthy attitude.” Not hard to have one when you are cycling!
GRINNELL
What more can one say about the “Jewel of the Prairie”?
CORALVILLE
Not much on RAGBRAI here though they do have us on the calendar along with a zoning commission meeting. Is there a connection? Of course they are having a big concert featuring 38 Special on the night we get there!
DAVENPORT
A much bigger place than most of the towns we visit there’s some stuff on RAGBRAI but it’s a happening place and much is going on at the same time. I won’t be there long sadly, into town and onto the bus I’m afraid. Sigh.
Slower, cheaper, less useful…