Yes, they have a little cordon around the base of the cairn and a notice that you are not allowed cross the wire (little do they know I'm an accomplished limbo dancer *arf*!) and there is a path up to the tomb now of gravel but I couldnt see that the night I went cos it was pitch black. Its an amazingly surreal place to be early in the morning and I'm really glad I managed to get there before the buses, there were loads even in February! I was trying to crawl into Genisheen wedge tomb later on only to look up and see 60 grinnning faces looking out over the wall from a high bus that pulled up for a gawk.