Since we boondock most of the time, we have stayed away from a residential fridge. You will have to go big on batteries generator or solar if you do. To get an idea of how big you would need to go, find out what fridge comes with your unit and see what the amp/watt draw is. Then figure out how long you think you will be with out electricity at any given time-over nite, days, etc. Then you can know what size solar/battery bank and/or generator you will need to run it.
In most cases, the residential fringes will work better, but they are power hungry. Just beware of the power needs and be able to fulfill those.
1987 Starcraft Nova tent trailer, purch. '87, sold 8.14
2013 Crusader 290RLT bought new, 8.14 lotsa mods!
2001 Ford F-250 7.3
Loving wife, R.I.P., 6/6/19
and Mason the always dirty dog! R.I.P, 2/19