Just by your own description and family demographics, I think you are a Toy Hauler candidate! If you get the type that has the rear bunks in the garage that move up and down, you'll have plenty of sleeping space, and room for the motorcycle when you travel.
Those beds are huge, easily sleep 4 kids, probably 4 adults too. Plus the dinette, and the master bed, and maybe even a fold out couch.
They make nice bumper-pull toy haulers, you can get by with out a 5er as Toy Haulers also come in various configurations. The side door Travel Trailer Toy Haulers also have bunk-beds that fold up too. Lots of options.
I think you are going to be a "Toy Hauler" family! I foresee the future!
