I've been to Cleveland!!!!
My hubby and I were there before the last FaithWriters' conference (in August last year). We flew into there, stayed at an Embassy Suites to the east of the city, then did some garden exploring before heading up to Livonia for the conference. The botanical gardens at Cleveland are quite lovely. We have pictures of them coming around on our screen saver regularly.
Then after touring around for a little while after the conference, we came back to Cleveland to fly out (back to LAX and then home to Sydney).
The conference is actually not that far from where you are (relatively speaking), so keep August 12 and 13 free this year (if you can ... and want to). It's lots of fun.