The maps seemed fairly accurate. Portages were generally in the obvious locations - starting in the very back of the bay, etc. They weren't always obvious though, as they're not terribly well traveled. But there were often small markers indicating their presence - a small bit of rope tied to a branch near the water, etc. Caution should be taken when paddling river stretches though. If you missed the portage, the current could prevent any going back. The Ogoki River could be especially dangerous as it is high volume and often deep near shore. Take the photo of the "canoe carnage" (see Inuk' album) below the River as an example!

Ranger