FWIW...I have a John Curl (wife is Susan McCoy) moving from Shenandoah Co,VA to Green Co,PA sometime between May,1801-05 (probably by 1803 as his grandson is born in PA).(His will is written in Green Co in 1805).I've been unable to find tax records for Green County.Tax records (supported by family records also) place two of John Curl's son-in-laws in Mason Co,KY (one by June,1806 and the other by March,1808) but no John Curl.Mason Co,KY borders the Ohio River across from Ohio state.Maysville was it principal river town.(Mason Co was huge in 1800 and scaled down considerably by 1810 to create Greenup and Lewis Co.'s both of which border the Ohio River east of the current Mason County.It would be prudent to check tax records for these counties also.) John Curl shows up in Bourbon Co,KY tax books in 1810 with both son-in-laws (Wm Whitson and James Whitson).John Curl dies here in 1814.
I know that the post was regarding migration to Ohio but felt, as families were known to migrate together, that this could have been part of the same family migration as it was in the same general direction/route/time.
Also, I would like to learn more about the Curls if anyone sees the connection.