These are federal charges, aren't they? There is no parole in federal court, though they may reduce a sentence for "good behavior."
Not my jurisdiction, but generally, unless the offenses were against their own children, offenders are unrestricted around their own children, and others for that matter, aside from schools, parks, etc. (depending on the level of offense).
Everything in his life, if convicted, will be regulated by the specifics of his post-release plan.
Christ on a bike. Before this I had no idea there were "sex offender rights" organizations. I don't know how to