[People walk through fields after they were sent out during a police operation to evacuate a makeshift camp at the Greek-Macedonian border near the village of Idomeni]By Phoebe Fronista IDOMENI/EVZONI, Greece (Reuters) - They packed up their belongings and began to walk, some heading for the fields, others to a gas station, all seeking to avoid going to state-run Greek migrant camps where they fear they will end up trapped. For months they had been living in Idomeni, a sprawling expanse of tents on Greece's northern border with Macedonia and a symbol of human misery until police and bulldozers began clearing it on Tuesday. Instead, dozens of tents have sprung up at gas station in the town of Evzoni, some six 6 km (4 miles) away, and dozens more were being pitched in a grassy field nearby.