Some basic advice about what to think about before you leave, and what to take.
Apart from obtaining a brief from your department on the general task in hand prior to deployment, there are issues that you should address which include:
Assessment of the area now and how it can unfold
Research on the area / possible actions from military / local habits / customs and routines
Risk assessments and analysis
Personal protection / equipment required
Duration of deployment
Points of contacts
Emergency safe places
Food and water
Evacuation routes and contingencies
First aid availability
Family - do they know where you are going and what you are going to do?
Does the family know what to do / who to contact in cases of emergency?
Wills / insurance / monies for family
The above list by no means exhaustive but gives you an idea of the issues you should consider.