I know it seems expensive, but I much prefer single sided maps. Trying to turn one over in your average highland weather is a complete nightmare. For my local area I ended up buying 2 copies, one folded to open on the east side, and the other folded for the west. On holiday one year I resorted to buying one of those bespoke maps, centred on the cottage we rented. A faff, but at least they don't, tear, blow away,or other disasters on the hill, and it is easier to plan a walk where you can lay two maps side by side, rather than turn one over and try to picture the bit you've just hidden.