If possible let your insurance handle it and attempt to settle with the guy or maybe even fight it.
Beware, insurance companies will often drop you after doing that and many others won't insure you afterward.
This is true but better than getting hit with a civil suit that results in a $20,000 decision plus legal fees that doesn't go in your favor. They will start by offering the guy something like $3500 or even less to go away, many times they take it and your premiums get a little bump.
