We stopped at Bergues about 20miles east of Calais. Very large aire but no facilities, next to old town with ramparts. We did one night at Bavay ok for overnight then moved on to Eppe Sauvage in France on the Belgium border. This one was the best of all overlooking a lake and we stayed several days, loads of facilities nearby including free Wi-Fi. All 3 aires were free and in the book and Quicksam recommended them to us. Hope this helps.