My layout has Star wiring for DCS based on Barry Boskowitz's DCS Ogage Companion. Track length is in excess of 300 feet, and the DCS signal strength is 10 in all locations including single end sidings.
Power wire feeds are all twisted pairs of AWG 16. All connections are sodered or screw terminals with the wire ends tinned because these are more reliable than speed nuts and clinch type connectors.
Avoid bundling power feed wires with wires connected to solenoids and signal devices. Keep the routing neat, and label the ends of all wires with masking tape.