As Mike says, Memqusit is a great place and I've stayed there a couple times myself and will be going back in August for another 2 weeks. Some excellent musky fishing in the area with some very nice fish.
Another nice place is Mashkinonje Lodge just a few miles west of Memquisit, also on the West Arm.
I stayed there last month and the cabins and new owners of the camp are outstanding and is another place I'd recommend.
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=73TCU7bOEom1yATW8IG4BA&usg=AFQjCNFF5F_8NXO_6P2FPvvzMdpB6FaP0w&bvm=bv.70810081,d.aWw