Congrats on your new IKSS!
We've used a bike rack on the truck (3 bikes) and 2 bikes in the camper. The camper bumper isn't designed to mount a rack
The pdi check list is the best. I don't think you can get the air sofa bed anymore, but have them show you how the couch works.
If it's a lot trailer , there may be stains on the outside (tent canvas), we had them clean it and throw in a bottle of canvas cleaner.
Practice opening and closing the tent ends. I know, that feeling to hurry up and get it home is overwhelming, but mistakes can not only be an aggravation, but costly.
Usually the dealer extended warrantee isn't worth it. FR does offer a second year warrantee for $150.
Enjoy your first trip (most likely in your driveway).