Faunmore and Closh/Clash: Sullivans and O'Neills emigrating to N.America in 1847

Hello,

I've been trying to trace this particular branch of my family tree for years and after a lot of poring over Latin church records and finding/bugging long-lost family members for clues, I think I've finally managed to narrow my 3rd-great grandparents to the Kilcrohane/Muintervara parish. 

Timothy Sullivan, b ~1810 & Ellen O'Neill, b~1815

Marriage record (1837) indicates they (or just Timothy?) were located in the townland of Faunmore/Fawnmore

Their first son, John Owen Sullivan was born in Faunmore on Christmas day, 1837

Their second son, William Sullivan, was born in Closh/Clash in 1840 

Their third son, Daniel Thomas Sullivan was born in Montreal, Canada in 1848, so they presumably immigrated during the potato famine (best guess from evidence is 1847) and move to St. Lawrence County, NY, where Timothy and Ellen lived out the rest of their lives. 

The Muintervara parish records only go back as far as 1820, so I've pretty much given up hope of finding out any more information about these Sullivans (their ubiquitous surnames don't help, either!)—though it would be amazing!—but what I would like to do is learn more about Kilcrohane and Faunmore/Clash and other things about life in this area during the 1810-1850 era. I'm planning a trip to visit  next year, so I'd love to be able to know where to visit, what areas their farms/houses might have been, if there are any historical societies in the area who could help, anyone with book suggestions about the area, etc. I'd also like to confirm whether the current standing Catholic church (Star of the Sea) is the same building that was standing back when my family lived there. I've been obsessively hunting for this family for so long that I still have that voracious need to learn more about them, even if it's only context :-)

If there's anyone out there familiar with the Kilcrohane part of the world, I'd love to chat with you!