The new improved access Rhiannon mentions above seems to be a great improvement.
There is now a small sign on the road heading east out of the village, it’s only about A4, and is almost obscured by a hedge, but it’s there, and it shows the permitted route. The last bit is still through crops, following the tractor tyre gaps. Not exactly easy for wheeled contrivances such as buggies and wheelchairs, more’s the pity. We did manage to get a big 3-wheeler buggy up there though.
The area around the stones is now crop-free, so future plough damage is likely to be nil.
On the down side, someone had deposited a can of beer in one of th grooves of the northernmost stone. Unusual form of ‘offering’, but compared to the usual dried wildflowers, at least it seems to have a bit more of an element of genuinely sacrificing something treasued by the offeree.