Hi Jimmy,
I can not post pics as I have not done my mod yet, but I am in the planning stages of the same idea. I am not too fussy about cutting into my trailer to install the outside speakers so I was contemplating two enclosed BOSE bookshelf speakers, mounted on swivels just behind the slam door. The car audio deck and amps would be mounted near the battery box (I have a compartment above the battery box on the door side of my Landmark).
I have been using a Bose sound dock (portable) up to this point, but it needs recharging from 110V - I mostly do dry camping so I think the outside stereo (12V) will suit me better.
I'll keep an eye on the other repsonses to your thread as I'm sure others have additional good ideas.
Take care,
Brian