Two places I'll recommend are Memquisit Lodge & Mashkinonje Lodge, both on the West Arm of Nippissing and probably 50 miles south east of Sudbury...give or take.
I was at Mashkinonje last month and liked it so much we've already booked for next June and I've stayed at Memquisit a couple times and am leaving August 9th for another 2 weeks.
https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&sqi=2&ved=0CBwQFjAA&url=http%3A%2F%2Fwww.mashkinonjelodge.com%2F&ei=4CLVU6-PNpKQyASGoYHIDQ&usg=AFQjCNFF5F_8NXO_6P2FPvvzMdpB6FaP0w&bvm=bv.71778758,d.aWw
https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&sqi=2&ved=0CBwQFjAA&url=http%3A%2F%2Fwww.memquisitlodge.net%2F&ei=CiPVU--ROYKyyASH4YLYCw&usg=AFQjCNGSBtQDrB8MkFPhKPcQfp05MIyJ4w&bvm=bv.71778758,d.aWw