All bases are different.
But, to be on the safe side...
Driver's license
Proof of insurance
Car registration
ID for anyone over the age of 10
If you are arriving in a rental car, make sure you have a copy of your car insurance along with the rental agreement.
We have gone on bases where they want everyone (not to include small children) to have ID cards.
They would want proof of insurance and car registration.
And that has happened WITH us having stickers on our vehicle. But, then again, we have had them just want an ID from the driver.
Like I said, every base is different.