Jonathan Kelly made a map of the area and posted it earlier this year:
http://www.myccr.com/phpbbforum/viewtop ... t=noganoshYou can access from other places, but Flemmings Landing or Ess Narrows are the closest public access points. There are many private cottages along the Pickerel River system with road access that would get you closer to Naganosh, but you'd have to know the person to park there or ask permission or whatever. It's not too far to paddle from either Flemmings or Ess anyway.
You can also put in at Port Loring, but you'd probably have to pay someone for parking. And it's a much longer paddle.
South access points and portages are less traveled and would be a longer distance. For example, you could put in at Wahwashkesh Lake and come up Farm Creek and through Island Lake, Kelsie Lake & John Lake. But I think you have to pay a yearly parking fee at Wahwashkesh (something like $30.00 last time I heard), and that route would be way more challenging- especially through Kelsie and into John. From the north you can get into Nagonosh in about 4-5 hours. From the south it would be a very long day, and probably more like two days.
It's now a fairly well-used lake. If you're in during the week or in the shoulder seasons you might not see anyone else. But on weekends you are very likely to see others and may not get your choice of campsite.