I havent been there hunting, but I have driven as far as Radisson on the James Bay Road. There is an excellent website devoted to the JBR and all roads off of that, including the one that heads to Scheverville ( I forget the name of that road). Google James Bay Road, and you wont have any problem finding the site. The road is paved as far as Radisson, and well maintained, although you will have very long stretches (up to 350 kilometers or so up to Radisson,) with no services at all. The web site will tell you much more in detail. You will be there for hours.