you would sweat in this neoprenes big time walking that far in them ive got 1600's no more than quarter mile walk at the most and youd have a real good sweat going. Wouldnt be very comfortable too sit long periods of time in either. My suggestion, find a couple heavy duty waterproof bags and velcro them around your thighs when crossing the creeks. water will naturally suction them too your legs. Only hassles i see would be putting them on and taking them off at every water crossing. my $.02