I am a 6 month newbie, also with a bumperless Sport. I know of one Sport member who ordered a bumper when she bought her 16, so they must be available thru AS. Re the camera I have ordered the Swift Hitch sh02 ( longer battery and suction cups included over the cheaper sh01). It is a small color/infrared wireless camer and monitor with a magnetic base. Used for hitching up and hopefully for backing up as well. No wiring and easy setup. The reviews on it are mixed. Some glowing and some complained they couldn't use it in bright light. A web search showed far more pluses than negatives, tho. $239 with free shipping from the manufacturer.
Swift Hitch SH02 Trailer Wireless Night Vision Camera
Compared to similarly priced units it had the best stated picture resolution.
Hope this helps and congrats!