Here is my 2 cents on it.
I added a DrawTite hitch and a light kit to my 2016 Volt. The sticker on the door says limit is 855 pounds maximum luggage and passengers. So if I do the math for a Motorcycle= me 200 trailer 300 Motorcyle 400 hitch/drawbar/ball 30 pounds, riding gear 25 pounds, 2 ramps 30 pounds =985pounds. 130 pounds over he 855. But you say the trailer carries the 400 pound bike with only 110 pounds tongue weight (rated 200). But the car still has to PULL all the weight. You might not exceed the tire or axle rating on the Volt but you do exceed the door sticker stated limit. Also the manual clearly states it is neither designed or intended to pull a trailer. All of the drive parts pulling and stopping the car see the entire weight. Only at rest does it not.
Now this gives Chevy an out should your Volt need warranty service. Since Chevy is dropping the Volt maybe this is no longer a concern or maybe it should be.
Since I have a truck and a trailer that can both carry my bike I do not choose to use the Volt but I could as I have done a 60 mile test run. What I save in gas over the truck does not cover the idea of no warranty. For now the hitch can support a bicycle rack and my bicycle which just so happens a bike rack is shown on Chevy's Volt accessory page on their internet site. I would assume they expect a hitch mount bike rack to have a hitch mounted on the Volt for it to hook into. Maybe a bad assumption...I don't think so.
I am not saying don't do it, I am just stating some facts and possible problems. I think a 1500 pound trailer loaded with more weight in bedding and camping gear/clothes may be just a little much for a bolt especially in mountainous areas with steep up and down twisty roads. Coming down hill with a trailer is far more exciting than going up hill if drive system/brakes get hot and fail.