Here is an interior bike rack that goes in the back of my 2015 360IBL. Not pictured is the blanket we put over the couch first.
This took a lot of bad ideas to come up with something that actually works and doesn't destroy the camper or bikes. As you can see things are really tight.
I used these metal mounts: https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
And the appropriate bike fork adapters. My mountain bike handlebars are turned backwards.
Hopefully I can save others some trial and error.