The pictures of the kindergarten are incredibly chilling.
I don't think I'd ever have the cahones to travel through that area. Purposely exposing one'self to the rest of radation doesn't sound very appealing to me... but I give the author a hell of a lot of credit.
There's substantial opinion that the kidofspeed site is a bit of a fabrication. The person who took the pictures almost definitely toured the zone, but on a motorycle unaccompanied, very doubtful.