tow vehicle
JP, the first thing to consider is the extra weight that you will be carrying. If you do as the previous post suggests, you will need to make sure that you have the weight capacity on your rear axle to carry the weight of the GoldWing and the carrier, which is highly unlikely since it will be multiplied by the distance that it is located behind the axle. I would figure that it will at least add double the weight of both. Then if you do add that type of carrier, I strongly suggest that you weigh the rig to be sure that your rear axle is not over weight. If you have a gas chassis, there isn't much doubt that it will be.
If you put it into the bed of your truck you have a much better chance of avoiding an over weight problem. What you need to check there is the GCWR or grass combined weight rating and then subtract from that the actual weight of your motorhome when ready for travel. You can get that at any public scale. The if the difference is enough there should be no problem in adding the bike to the pick-up bed. But I would be sure to have auxilary barks for the pick-up to be able to stop in an emergency.