for years our camping radio has been a GME GR200, mounted onto a piece of aluminuim, with some small stereo speakers i had left over from a stereo inside, i have just recently added a USB double charger to the unit so i can charge my phone and ipod.
its been great, adapt the plugs to suit what you need to get power from, i have an anderson plug on it now with 2 seperate other plugs, merrit and just aligator clips so i can connect straight to a battery if needed.
last year at Moreton Island i was sitting there listening to what the fishermen in the boats were catching too.