I did quite a bit of driving (almost 3000km) in December and, surprisingly, saw precious few snakes - would have thought i'd see a few more! These are a few I managed to take snaps of:
Slug Eater, just outside Worcester, WC
Brown Water Snake, Buffeljags, WC
Brown House Snake, Malgas, WC
Also saw a DOR boomslang on Tadouws Pass (WC) and a DOR black molesnake around Three Sisters ... they were pretty grusome so i'll spare you the pics.