A little late to the thread, but here goes:
My wife and I backpacked the Pow Wow Trail this past April, hiking the same direction (counterclockwise) as Jason Rasmussen. She had read the "Lost In The Wild" story just before we left, and I then read it the following week during a layover day camped on Ima Lake.
As for whether the trail is tricky in the spot where Jason got into trouble, yes it is. The big difference today is that there are now two signs with arrows that point you in the right direction (see photos below). The problem is that the trail forks at this spot, but the "wrong" way is more straight ahead on a path that is more open and obvious than the "correct" way. The "correct" way is a left turn on a less obvious and partially obscured trail. To be honest, I'm surprised more people didn't get into trouble here. Nonetheless, if you're paying attention to your map and compass, most people would probably realize their error before getting into trouble. You should be expecting a turn to the west by this point, and if you find you're heading straight north, it should put up a red flag.
On a side note, just last week I also paddled through the pothole lake where Dan Stephens from the second story got lost. There too, it's easy to see how Dan went wrong. The portage landing leading to Bell Lake is very hard to see until you're right upon it. The dead cedar tree mentioned in the story that leans over the portage entry is still there and blocks it to the point where you actually have to duck under it to get to the landing. If you don't pay strict attention to the map and just try to spot the portage visually from across the lake, you could easily settle on one of the "cave-like" holes in the wall of shoreline foliage also mentioned in the story.
Wrong way:
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