Visited 11.4.10.
No public right of way to site and very difficult to park on the road (B3306) from which the tomb is easily seen. I just about managed to park (not very safely) on a grass verge and satisfied myself with a quick look before moving the car not to cause an accident. The site consists of what appears to be a large jumble of stones in the middle of a field. There didn't appear to be any way you could get close to the site for a 'sneak' visit without asking permission from the land owner.
A fantastic Scillonian entrance grave close to Lands End. About 15ft long with five capstones still in position. Marked as Chambered Cairn on Landranger, close to Penzance. National Trust land but ask at farm/house for permission. Quiet and beautiful.