@edgarblythe,
You have gotten some good suggestions, but I am going to jump in here.
Speaking as a firefighter, there are several simple things you can do.
Remove any flammable cleaners or solvents you have, put them in a storage area.Have at least 2 fire extinguishers handy, but make sure they are accessible easily.
Have more then one way out of your trailer so that you cant get trapped.
BUT, the best thing I can say is that if your trailer catches fire...GET OUT!!!!!
Most trailers are built with so much flammable material that if it catches fire, the local FD wont be able to do much more then put out the embers.
Most trailers will burn down inside 10 minutes and there is little that can be done.
As for the lack of hydrants, find out if the land is on county property or not.
If it is, you might be able to get th county to install hydrants, but it would be expensive.