Hi Lisa!
Unfortunately, the RC records ( I assume your family was RC) for Ardara RC parish do not begin until 1856 for marriages and 1868 for baptisms. Finding pre-1850 RC parish records for Co. Donegal parishes is very difficult.
The 1857 Griffiths Valuation head of household listing for Inishkeel civil parish has a number of Sharp(e) records and a number of John Gallagher records. See below.
Let me know if you have ancestors who were born in the parish post 1863 or families who might be in the 1901 census.
Have a great trip! It does not appear we have a volunteer in Inishkeel parish.
Roger McDonnell
Sharp Patrick Crannogeboy Inishkeel Donegal
Sharpe Connell Loughfad Inishkeel Donegal
Sharpe Daniel Lackagh Inishkeel Donegal
Sharpe Francis Loughfad Inishkeel Donegal
Sharpe Hannah Ballymackilduff Inishkeel Donegal
Sharpe James Ballymackilduff Inishkeel Donegal
Sharpe James Glenmacannive Inishkeel Donegal
Gallagher John Adderwal Inishkeel Donegal
Gallagher John Bellaganny Inishkeel Donegal
Gallagher John Derryness Inishkeel Donegal
Gallagher John Doobin Inishkeel Donegal
Gallagher John Lackagh Inishkeel Donegal
Gallagher John Lerginacarha Inishkeel Donegal
Gallagher John Meenagolan Inishkeel Donegal
Gallagher John Meenmore, East Inishkeel Donegal
Gallagher John Montymeane Inishkeel Donegal
Gallagher John Mullanmore Inishkeel Donegal
Gallagher John Mulnamin More Inishkeel Donegal
Gallagher John Rossbeg Inishkeel Donegal
Gallagher John Tullynaglaggan Inishkeel Donegal
Gallagher John, Jr. Mulnamin More Inishkeel Donegal
Gallagher John, Sr. Mulnamin More Inishkeel Donegal