You also have to have a sponsor they can contact while you are there. And make sure you have no weapons in your vehicle. No guns or knives.
Your vehicle registration and car insurance. I cannot emphasize this enough when I say make sure they both match because if any one of them is off they are not going to let you on the base. By match I mean make sure the vehicle and the insurance card both have the same VIN number to the vehicle cause they are watching very closely. Also be ready for a long wait because being in line there is like getting in line to get your driver's license renewed.
It would be beneficial to have a concise detail of admission requirements and procedure on this page.
These two guides give the basic requirements for entry to base. You also need verifiable evidence of a destination and a contact person on base to receive entry. JBLM does have a phone contact if you need further information.
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