everyone that has NOT owned a toy hauler says "I don't want to smell gas fumes" and insist that an open floor plan will permit this. Nothing could be further from the truth unless your toys leak gas. Properly maintained toys will not smell. Does your garage smell like gas? Mine doesn't.
Talk to those that have them, it is NOT an issue. Just had a friend that was forced to live in his Raptor for over a month while his wife was in the hospital out of town. He'd taken his Razor with him so lived with it in the garage, no issues, couldn't smell it.