Ohio

General

Discover Ohio http://www.discoverohio.com/ This site from the Ohio Division of Travel and Tourism has a calendar of events, has a featured destination of the month, brief information on each large city, and allows you to book a room through the Ohio Hotels and Lodging Association's website.
Frommers.com: In the Heartland: An Ohio Road Trip by RV, Part I Road Trip Route: "From Indiana, you can cross into southern Ohio to Dayton, then south to Cincinnati, east via to the Serpent Mound to Portsmouth on the Ohio River, and along the river to Huntington, West Virginia. From Huntington, head north toward Chillicothe, detour east into the Hocking Hills, then drive northwest via Circleville into Columbus. From here, go due east into Zanesville, where a museum salutes our National Road, then north to Coshocton, and on to Cleveland. Turn west from Cleveland and follow a southwest route to Mansfield and Marion, then drive north again to Toledo. The Ohio route covers about 1,000 miles, of which you can pick and choose any part to follow, or go for the long haul."

Ohio Bed and Breakfast Association http://www.ohiobb.com/ You can search for a Bed and Breakfast throughout the state
Ohio Hotel and Lodging Association Online Reservations http://ohla.org/lodging/search.htm/ Search for and make reservations at hotels throughout the state with this site from the Ohio Hotel and Lodging Association

At-A-Park http://www.atapark.com/ Ohio State Park Resorts and Conference Centers. Seven unique resorts open year-round
Buckeye Trail - Ohio http://www.buckeyetrail.org/ This trail links the four corners of Ohio in a circuit running from Headland Dunes State Park on Lake Erie, south to Cincinnatti and back around the state to the west. A very well developed site with trail information for all stages of the circuit.
Conkle's Hollow This December 26, 2007 article from the Akron Beacon Journal describes Conkle's Hollow in the Hollings Hill region in the foothills of the Appalachian Mountains in southeastern Ohio.
Ohio Canal Corridor http://www.ohiocanal.org/ Learn about the effort to create a park system that follows the route of the historic Ohio Canal from Cleveland through Zoar to Dover/New Philadelphia.
Ohio Grapes http://www.ohgrapes.org/ Information on visiting an Ohio winery.

Ohio Magazine http://www.ohiomagazine.com/ The website allows you to search through their archive of articles by location.

Cincinnati USA http://www.cincinnatiusa.com/ A Visitor's Guide from Cincinnati.com, The Cincinnati Enquirer and the Greater Cincinnati Convention & Visitors Bureau (GCCVB).
Northern Kentucky: The South Side of Cincinnati http://staynky.com/ Information from the Convention & visitors bureau