I did it at lower water in the fall a couple of years ago and only the first few crossings were significant - the trails follows the east side of the brook for a long stretch in the middle. At high water you definitely would have to get your feet wet on those lower ones (unless some work was done). Of course, if you come out that way you might already have wet feet anyway. If the crossings are bad you could always whack east/northeast up to the UNH trail - I recall it being mostly hardwoods, but I don't recall the thickness of it. Depending on the route it might add 200-600 vertical. You could also whack up to FR511 on the west side of the brook and take that back to the Kanc and do a short road walk. Lots of options!