You could drive it for 5-10 minutes and then feel the center of the rims to see if it's the bearing or not. If it's the bearing that rim should be a little warmer than the others.
If you have another person to help you. You could let it roll forward very slowly while you listen near the tire/rim. I would do this without the engine running if you have a road/area that is a a slight decline to help with the rolling vs having someone else also help push the vehicle.
If you have an old camera or cell phone. You could zip-tie either to the frame while it's pointing toward some of the parts that are suspect to noise. Just keep moving it and re-zip-tie it until you find exactly where the noise is coming from.
You could also use Eric O's trick of the large screwdriver attached to a gallon jug. This would only work while the truck is jacked up in the air but, you might be able to hear more noise with this than just by listening with your ears.