I've been with USAA for years, not only with my cars, but also with my home, etc. They are a fantastic company. However, with the insurance climate as it is today, I would take the advice of the others here and really consider doing this on your own. Not only do you have to consider rate a increase, but perhaps the possibility of not having them insure you in the future.
My wife had an accident not too long ago and called USAA to ask some questions. Next thing I know is they are filling a claim. I had to call them and let them know that there wasn't a claim, we just wanted information.
For us, it wasn't worth while to file and risk the possibility of rate increases. Of course, her accident only cost a few hundred dollars.
Good luck. I am sure USAA will work with you.