You should be able to see visible signs of damage on the exterior before any plumbing or electrical melts. I’d have a look at the roof and if there is any discoloration at all to the aluminum or clear coat (aside from soot that should just come right off with water and a soft brush) or melted AC shroud or vent lids etc I’d want someone to pull the interior ceiling panel and inspect the wiring. If all the windows and vents were closed, the interior may not have any smoke smell, but it really depends on the fire behavior.
There is athread on here about “The Phoenix” which is a trailer restored by a member here after it was in a similar situation to yours. Worth a read.
http://www.airforums.com/forums/f516...ud-131783.html
My fire experience was a little more obvious...