No one has mentioned Snake boots!. Lighter that rubber boots, lighter than many hiking boots.  15" high waterproof, great ankel support and resonable in price if found on E-bay.  I use a pair this spring and will not use other wise when portaging.  I used the rubber boots, they are now on the bottom of Pickrel Lake, wore sandals and wool socks for next 10 days, with temps in the 50s and rain.  I don't like cold, clammy feet especially when fishing all day or doing many portages. ;)