Back in 2010 when the RTs first came to market, Teddy had me buy him a Timeless Black RT-S along with the matching BRP RT622 trailer. When BRP designed the RT Spyder, it was designed in conjuction, from the start, with the RT622 trailer and (IMHO) they did an AWESOME job with the design and engineering, especially the suspension. As others have mentioned, the design & styling perfectly match that of the RT Spyder.
Our first real test of the trailer was on our 1800 mile road trip from Cincinnati, Ohio to St. George Island Florida in July of 2010, with plans of camping at the Islands park, just two months after our purchase in May. The tongue weight of the RT is rated at 40 pounds & towing capacity of 400 pounds, as recommended in the Owners Manual from BRP. We loaded a cooler in the front clamshell part of the trailer and our tent, suitcase and the rest of our gear in the larger rear clamshell part, with plenty of room for everything.
When we got into the mountains of Georgia, while doing 80 mph, the heavens opened up with buckets upon buckets of rain and I honestly had to keep checking my mirrors to make sure that the RT622 trailer was still back there, seriously, the suspension on it is THAT GOOD, it kept feeling as if I wasn't towing anything at all. If BRP would have made a camper option for the RT622 trailer, there would have been NO WAY that I would've sold it when Teddy had me upgrade to our 2011 SpyderFest Edition RT-S from Len & the crew at Cowtown.
Since Teddy & I luv road-trips and camping, we needed a trailer that would serve multi-duty and we found that with our Moto-Mate camper. It works well for us and our needs, but it doesn't handle nearly as well as the BRP RT622 trailer. So, (IMHO) the BRP RT622 trailer is an awesome unit and if you do your research, you can find a new/used/left over unit for around 1/2 of full retail, which in my opinion, is totally worth it. Another local RT owner just picked up a left over 2010 model trailer & for right around $3 grand, if I remember correctly, so deals are out there to be made.
There are many other options out there as well, just all depends on what your needs are, your finincial availability, and your desire of styling if you want something that matches the RT perfectly or not. Good luck on your search & keep us informed on what you choose.