2013 Brick Wall Priorities (on the Wood tree)

Will 2013 be the year of breakthroughs on my most challenging brick walls? Here are my priorities for the coming year's genealogy research into hubby's family:

• McClure. Are hubby's 3d great-grandparents (John McClure and Ann McFall) originally from Donegal? They married in Rockbridge county, VA, in 1801 and one of their sons was Benjamin McClure (1812-1896), the subject of my Facebook genealogy experiment. If John McClure is from Donegal, is he Scots-Irish? Where in Scotland did the family come from?
• Rinehart. The patriarch of the Rinehart part of the family, Joseph Rinehart, died on December 9, 1888, 124 years ago tomorrow. His very brief obit in the Wyandot County Republican reads: "Joseph Rinehart died Sunday morning, Dec. 9th, at the residence of Mrs. E.G. Steiner [his daughter, Elizabeth Rinehart Steiner], aged 82 years. Funeral Monday afternoon at Oceola O." Joseph was born in 1806 in Pennsylvania; his mother's name was Elizabeth but his father's name I have yet to discover. Did they come from Switzerland or Austria or Germany? And when?
• Shehen. Who were John Shehen's parents and what was John Shehen's wife's maiden name? John (1801-??) was hubby's 2d great-grandpa, born in Ireland, as was his wife, Mary (1801-??). Where in Ireland, I don't yet know...
• Slatter. Where and when did John Slatter Sr. die? He was born in 1811 in Oxfordshire, England, and he was hubby's 2d great-grandpa. Who were his parents and where were they from?

2022 update: I later discovered that yes, John McClure was descended from a Donegal McClure family (see this ancestor landing page). I don't have many answers about the Rinehart family, but here's that ancestor landing page. I do know about the Shehen family and the Slatter family! See this ancestor landing page.