Congrats & welcome ! In the end all's well that ends well ! You'll learn to adapt to your coach a little (we all do).
I always tell folks to take a shake down "cruise"....find a campground CLOSE to home for a weekend....that way you can you're not stuck if you forgot anything, you're in familiar territory & you can start building your list of things you want or need for future trips.
Its strange that a diesel pusher would have a propane generator - but then again anything is possible.
the OP (original poster) might be better off w/ a Haulmark, Renegade or Showhauler conversion truck with a garage (6-12 feet) for their motorcycles. Its still a buyers market if you're willing to consider used.