Keep off the Grass
The rules are quite simple: stay off the grass, especially the moss, as that soaks up radiation. No touching any objects. No placing your camera on the ground. No taking of any items. No 'muscle' tops, which presumably meant Rambo would not be making a visit anytime soon. That said, I nearly had to forfeit my trip as I'd foolishly arrived in a t-shirt and was only saved when someone kindly offered me a spare top. This readout depicts 0.247 R which is around forty times the usual levels. By the way, for the astute Russian readers amongst you, the writing (or the manufacturers's name) on the Geiger counter reads as 'Pripyat'.