hope you enjoy your stay in donegal, glenveigh national park is good for a day out, so is ionad cois locha in dunlewey (about 30 min drive) in the poisoned glen, at the foot of mount errigal.it has boat rides on the lake and a small farm and play areas. you have to go further west for (in my opinion) the most beautiful beach in donegal, carrickfinn, beside donegal airport, desperate roads but worth the effort. good luck
for eating always found the brewery and pat's on the square very good(both in market square area)