Once they'd worked out a schedule, planning the patrols had been fairly simple. Between the map of the town they were given and the maps that Babydoll and Jefferson provided they had a decent working knowledge of the layout of their current home. They tended to do it in twos, unless Rick's group were coordinating a three man full circuit.
Emma was fine with Rick's delegating to the people he knew well enough.
"Yeah, I thought Storybrooke was small, but this is like half the size." All in all, it took approximately two an half hours to do a full circuit of the town. When there were things to have a look into, it obviously took up a little extra time, but all in all, there were few problems at any given time.
The nights were always the worst, which was why there were more patrols.