Tons of ideas and tutorials! Browse this post and pick one of these murphy bed projects! Would be a great use of space in a smaller cabin.
Attic room: Building a bed with hidden storage under a slanted ceiling.
31 Best Fitted Wardrobes
Very cool pull out closet racks - great for an attic room or closet/wardrobe room.
Attic Bedroom Closet Design, Pictures, Remodel, Decor and Ideas - page 9 - sublime-decor. I have the perfect wall (with attic behind it) to do this. I've often thought of making an easily accessible closet there.