Elsewhere, others have posted some information on useful items to take into the field. As some SETs are coming up, I thought a reminder would be useful:

• Laptop
  
  • power supply or extra battery
  • wireless nic with pre-installed drivers
  • netstumbler, kismet, other wireless software
• Antennas
  
  • suitable coax
  • N/SMA/TNC/MMCX adapters and pigtails
  • tripod or other mount
• Routers
  
  • power supply or battery
  • POE injectors
  • ethernet cables
  • loginid and passwords
• Other
  
  • sun shield for you (hat, long sleeve shirt, sunscreen)
  • sun shield for the laptop screen
  • GPS and compass
  • table and chair
  • water
  • AC inverter
  • HT, power supply or extra battery, antenna if necessary
  • screwdrivers, pliers, wrenches that any of the above need
  • notepad and pen