Verify bias voltage with no load
If your goal is to measure the no-load voltage, for most cases you can simply use the multimeter. When set for "DC volts", a multimeter already contains a built-in resistor in the megaohms range, so only a tiny amount of current will be drawn from your output. Unless your circuit is very sensitive or is operating in the microamps range, the current drawn by the meter will have a negligible effect. If you add your own load resistor, its resistance will be in parallel with the meter's own internal resistance.