Dedicating a camera for this purpose did come to mind, but expense really became a factor there. I have motion sensor lighting pointing towards driveway (I know its not always sufficient, and its probable the light will reflect off the license plate, thus creating an obstruction.
It amazes me how Swann (and other DIY kits) really market their cameras nowadays, stressing on their theory that a higher MP-count will equate to making out finer details like license plate #'s (that's their view), I'd be pleased if their fixed-lens cameras works out for me, I have yet to receive the kit, higher MP cams is also going to compromise the overall quality of night vision. I'm keeping my options open and am also strongly considering direct-Dahua / Hikvision as you suggested. If only I can get a hold of a genuine seller based in the US.