solar on/off grid installation

To really hit on specific advice, share what you have now and how you use your RV.

right now power really is not an issue. the places i have traveled have power hook ups. However, there are some places i want to travel were i will not have an external power source available. With the panel array that i am looking to purchase, I am sure i can get by with 3 or 4 batteries. I do have a 1000 btu portable air conditioner that uses 250 watts. I would not use this often, but i would like to have the option if i find myself in a place with no power hook ups. I might only find myself in this type of scenario once or twice a year and just for 2 or 3 days. I do have a 24" flat screen tv in my camper, but i also have a nice laptop that i can use when if power is an issue. I have limited space on my roof. My camper is only 14' and i have a 8000btu ac, antenna, bathroom fan, and a few other things on the roof. do you think 400 or 500 watts of panels would charge enough batteries to run a 1000 btu 250 watt ac for 6 hours at night? other than the ac, i would only need panels to run lights, a radio, charge a cell phone or laptop, maybe run the tv occasionally, and stay in when the power goes out in my house (i live in the midwest and it happens multiple times a year).