Re: NO POWER
I would check ALL the breakers inside the trailer. Trip them off, make sure they go all the way to reset them, and then turn them all back on.
If that doesn't bring all your AC power back, then I would start with a meter to check where I have power in the breaker boxes and where I don't. It could be a bad breaker or a loose connection inside
the breaker/distribution box inside the trailer.