For locos working hard, Kelling Heath station is a good place as it's in the middle of the westbound climb from Weybourne. There is a foot crossing at the summit of the climb, then it's basically flat to Holt.
Several decent locations around Weybourne station including the footbridge and the west end past the overbridge. Holt station is quite good for signals and on-the-move single line token pickups and drop offs.
Just to give you feel for a few of the places, my video from the Autumn Showcase event last year (the thumbnail picture is at the west end of Weybourne):