In reply to mikesuth:
Trail-running shoes didn't work for me when I tried long-distance walking in them. They're designed for running, where your momentum keeps your weight forwards. Long-distance walking uses your muscles differently, especially when you're carrying a pack (and I couldn't keep mine below 12kg for those first few days on the Cape Wrath Trail where there are no shops unless you detour to KLB and none after that anyway). I ended up with an ankle problem that needed physio to fix.
I solved the lightweight footwear problem with Salomon approach shoes. I've done several hundred miles in them in rough terrain and they're superb. I don't use anything else now.
But in terms of wet feet, best not to assume that you'll ever have dry feet on this particular trail! It's not just the river crossings - much of the route is soggy most of the year. Good socks are critical if you want to avoid blisters.
It's a breathtaking place though - enjoy!