depends on how much your feet sweat, mine dont sweat much, rocky terrain eats shoes though, the appalachian trail in Pennsylvania literally ate a pair of mine, West Virginia has those little pointy rocks to walk on too, they kill boots, dunno what the canyon will be like other than desert like and rocky, mostly sandstone I think though
last pair I bought for that type of hiking was nike air ascent lightweight hiking boots, bought them on a whim, turned out to be much better than I thought they'd be, weird looking but comfortable and tough
hard to beat merrill's for longevity and comfort, but they take tons of miles to get broken in
as far as socks, doesnt matter what weather, I wear cheap thick hiking socks from where ever I can find them, im gonna wear holes in them anyway !!