Beside the motorcycles themselves, the best toys I have bought are the Kendon Trailer and the Abba bike lift(sport bikes only)
The trailer is awesome, max load is 2000 lbs, so putting a Rocket on it is no problem. I had mine R3R on it a few times, once for 3+ hours, and there were no issues. It rolls behind the vehicle so easily it is like it is not even there. From Miami to Houston I had the Super Duke and the V-Star on it, which combined are about the weight of 1.5 Rockets and no issues there either.
I have this one and added a center chock also. They say it self levels with only one bike on. But for only a couple hundred bucks more, I don't have to stress about an uneven load on one side.
Dual Ride-Up SRL Folding Motorcycle Trailer - Kendon USA