Proper footwear is also very important. Airsoft Hawaii's terrain is very uneven in spots. Ankle supporting shoes or boots will help prevent ankle injuries as well as prevent dirt and rocks from entering your footwear.
Knee pads, elbow pads, and gloves, while not mandatory, will all help protect you from environmental hazards such as thorns, rocks, and sometimes even bugs.
Safety gear will keep you coming back for more. So before you spend that extra money on that cool new attachment for your gun, think about safety gear first.