This is the beauty of this forum. Shared wisdom from shared experience.
I own both a single and double 1up bike rack which I have used with my 560. I love these racks. The manufacturer does not recommend more than 2 bikes on the back of a camper. Keep in mind as you add more length, you increase leverage, and as you add more weight, you lighten the tongue which can lead to dangerous swaying if your tongue is too light.
The good news is that both the single and double bike racks can be unloaded and folded in the up position, maintaining access to the galley. We have the SUV height 560 and my wife, who is 5'3' complains that the rack pushes her too far from the stove to cook comfortably. I am 6'3" and can manage it, but unless we are having a quick roadside lunch, we remove the bike rack once at camp. An easy place to put it is on the tow vehicle. Which is also nice because then we can easily take the bikes with us to a trailhead. The single 1-up is out of the way at the waist level when folded up.
I have also researched the rakAttach swing arm but there were 2 concerns. One was incompatible fit with the 560 bumper, causing the bike rack to be just too far from the back of the camper and increasing leverage. The second was the added weight as they are not light. If you are going E-bikes, they are heavier than regular bikes as is. Some have removable batteries that you can store elsewhere which would be a good idea.
See pictures below of a single and double bike rack in the down and up positions.
My only cons to these racks, are the obscuring of the camper brake lights and turn signals. I was intrigued by the
Kuat Pison Pro-X which has integrated lights and a similar functionality to the 1up racks. This would require an additional 4pin connection at the back of the trailer which I have heard is possible with Cary's help.
Let me know if you have more questions.