In reply to Mike Peacock:
Hi all, dropping in to say thanks for the suggestions. We had a fantastic week. Beach days at Monreith Beach (near the golf course) and Rigg Bay near Garlieston. Stopped at Cruggleton Church which was suitably eerie. Forest days in Glen Trool (Bruce's Stone, plus kayaking the loch), Kirroughtree, and along the Queen's Way (Murray's Monument, Grey Mare's Tail, red deer range). Oh, and Wigton for books too!
Really enjoyed the area and the mix of coast and hill, and already booked for a return visit next year.