Mine's going to be similar to Matt's (the one he just got rid of) with the tool/battery box down the side. I don't subscribe to the theory of inverters and 240v chargers etc so mines just a direct feed from the isolator with atleast 6mm cable (atleast on the ground that when the new box goes in I may re-wire with the heavier cable I got given purely because I have no other use for it) to the second battery.
Off the battery I have specifically rated fuses for what jobs are getting done and those jobs are Fridge, 12v outlet and canopy lights, power for CB and live power for the reversing camera screen, separate power to a 19V adapter to run the laptop/new GPS toy (depending on what I go with) and another 12v feed for the DVD player and screens.
No pictures until I actually get around to finishing it, the box is built, the roof console has arrived and now I just need time.
Oh yeah I'm also mounting a coloured analogue meter on the wall of the canopy which will be live at all times and easily read from any window of the canopy.