I would seriously consider not carrying your bike (or bikes) on that back receiver.
For one thing, the carrying capacity is very limited, AND the bikes increase the moment arm (which reduces the capacity from what you might expect). Further, putting a 2" to 1-1/4" adapter on there increases the moment arm even more.
Secondly, the bikes will be completely out of sight. If they come loose, or start dragging, you will not only lose your bike(s), you may injure someone (or worse).
Much better to pack your bikes in the back of your TV (if you have a pickup), or even inside the R-pod where they would be shielded from mud and other road debris.