Circuit breaker, fuses?? Enough guesstamation goes on here without having to guess your model of Airstream as well. This is an excellant example of why all of us need to fill out our profiles.
What kind of trailer would be a minimum, where you're at would be helpful as well. Several forum members have actually been able to physically drive on over to each other's place and help one another, you would be surprised how helpful your fellow man can be and how small of a world it can actually be.