I've heard pretty good things about hitch mounted carriers. The investment is more up front but the rewards are great in the long run. You might want to look in to adding a tow bar and trailer hitch mounted bike carrier.
I installed my tow bar myself and it took all of 15 minutes and 4 bolts. You wouldn't need to add a trailer light harness.
I installed my tow bar myself and it took all of 15 minutes and 4 bolts. You wouldn't need to add a trailer light harness.