Please tell me you have a compressor fridge. If its a propane/AC absorption fridge, it will destroy you. On AC, a 7.6cu-ft typical RV fridge will eat 5-6kWh/day.
If you haven't already, you need to do an energy audit. List all your loads, their power, and how long you want to use them. There's a
spreadsheet in Resources to help you with an energy audit.
Flat panels on an RV roof will only harvest about 40% in the winter compared to summer output. If you have a typical area you'll be "camped" in, you should use PVWatts or
http://www.solarelectricityhandbook.com/solar-irradiance.html to see how much daily sun is available by month and plan accordingly.
Given that you're committing to full time use, you really need to do this planning. You may find that it doesn't matter how much solar you have, your winter power needs may exceed your solar, and you'll have to use propane, run a generator and/or deploy a lightweight
ground array for the lean times.
Could you sprinkle 4X 100W panels in the gaps? 4S 100W would give you ~72V and would work nicely on a second controller.