Visited this at the weekend, but not much to see, to be honest.
Parked at the bottom of the hill, there’s a parking area at the junction with the main road. Pleasant enough walk up the hill (the road is marked as no through route for motor vehicles) – very quiet, even the traffic noise was negligable, so very peaceful.
If you walk up the road and reach the pylons, you passed the barrow. It’s in a field to the left – no obvious way in and it’s in the middle of a cultivated field so I didn’t trespass to get to it at all. All that can be seen is an uncultivated ‘lump’, although there are apparently a couple of possible entrance stones to be seen.
There are good views all around. 2-300 yards difference in the location and it would be a different story though.