Just done a check on the mileage from Milford to Culdaff and estimate it's about 50 miles, a bit too far for a night time session, especially on Irish lanes at night with Wombat driving (she doesn't see very well in the dark)
However each day we go out to different area and we will hopefully get all over the northern end of Donegal (I've had a couple of trips to the area from Letterkeeny?Dungloe down to Donegal bay)
Thanks to one and all for the suggestions though, please keep them coming

Raggy