Local Civil Air Patrol Unit can provide more information on survival techniques, local hazards, and how to make yourself more visible to rescue crews. 
Generally, staying with wreckage makes a more visible target. However, if wreckage hidden by trees, and clearing is easily accessible, make self more visible at clearing 
A halon fire extinguisher is great for putting out fires. It can also be used to deter animals. 
If possible, practice with a fire extinguisher. A local fire department can offer times and dates for training sessions if/when they are available.