The extra noise will make things somewhat more difficult (due to worse SNR)… are you routing both a CLK and GND pin? i.e. if you only route the clock as a single wire it will have issues due to lack of return path… even better is a coaxial cable, but just two wires side-by-side (i.e. piece of a ribbon cable, or twisted-pair cable stolen from ethernet cable) will be better!
Connect both the clock and ground on both sides of the system (MCU and CW-Lite board, there is GND pins beside the HS1), I’d still use the series resistor too.