I think D and G is one of the nicest areas of Scotland and, as yet, relatively unspoilt. I spent many a week walking and touring (motorbike and car) up there. Glen Trool is worth a visit and, if you're feeling fit enough, a climb up to the Merrick. Anywhere round Auchencairn (Balcarry bay, rascarral bay - all good photographically) . The route from New Galloway to Newton Stewart along the A712 is scenically good, especially near Clatteringshaws Loch. There are stacks of coastal roads as well. Don't forget to visit the Mull of Galloway. TBH, there are loads of places to visit. One of my favourites is the Gem Rock Museum at Creetown ( I wonder if it's still there?). Enjoy yourself!