First off, hello and welcome to the furnace. do you have a thermostat inside the trailer on the wall somewhere? Outside you would see a steel pipe with a plate over top with the word "HOT" stamped on it. That would be the furnace exhaust. It is possible that it doesn't have a furnace.
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now, i am no expert, but thought i would chime-in on what i do know.
my furnace has no pilot, as it is electronic ignition. and being that mine is a 1989, and your is a 1997, i would suspect your is electronic as well. as long as there is LP-gas, and the furnace fuse is not blown, i don't see why it would not light by simply turning on the thermostat. i haven't tested my current one for function yet, but my first one would spin up the fan for a few seconds, wait a delay after the fan was up to speed, then i would hear the ticking of the igniter firing, the gas valve would turn on, and "WOOF", the furnace lights.
they are compact units, both of mine. roughly 24 inches wide, 18 inches deep, and 8 inches tall. they fit most anywhere. my first camper had it under the fridge, and my current has it under the couch.
they generally run off of 12V power, though in writing this, i have seen some campers with just a vent-free space heater...
so when you turn on the thermostat, do you hear the fan start? (may be a slight delay...)
if not, check fuses.
if so, wait a bit for the fans to run. there must be a draft before the furnace will light. the draft fan usually runs the blower fan as well.
if you hear ticking, then it is trying to light. if it fails to light, depending on the furnace, it will either shut down in error, or keep trying.
if it lights, great, you have heat! if not, maybe a LP gas valve is off somewhere.
they are not usually very complicated appliances.
Hope this helps in some way.
~Travis
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