"Two decades after the explosion at the Chernobyl nuclear power plant, radiation is still causing a reduction in the numbers of insects and spiders."- on the BBC web today.. 

I've been reading "The Oral History of Chernobyl", which amazing... Borrow from me if you are interested. Awhile back I exchanged emails with a company who conducts day trips to Pripyat, I asked them if it would be possible to do an overnight stay and they indicated that for an extra charge it could be arranged.

http://www.angelfire.com/extreme4/kiddofspeed/index.html