OK, you need to get some tungsten studs to put into the felt soles of your wading boots, this will give you good grip on the hills.
And, if you're going to be wading on a regular basis, then you MUST SERIOUSLY CONSIDER getting a wading staff, especially if you're going to be fishing rivers you've not fished before. If you don't have one, how are you going to know where drop-offs, holes, snags etc are? You could get yourself into some serious difficulty if you're not careful. FWIW, I've got a collapsible one by Snowbee. Comes with it's own holster that you can attach to your wading belt. Also, has a rubber foot on it so you don't make any "tap tap" noise when you're wading, if you would with a metal tipped one.