Dad is nuclear physicist, and he has educated me about many things. He is much more worried about the speed my bike travels than about the direction I point it.
My trips to Chernobyl are not like a walk in the park, but the risk can be managed. I always go for rides alone, sometimes with pillion passenger, but never in company with any other vehicle, because I do not want anyone to raise dust in front of me.
Go read it. You will learn a lot.