Crash investigators do this for a living?

Beside getting pictures, record all conversations (in person and phone) with any one, that has anything to do with the accident, even your own insurance company and your own lawyer. Stories change and/or not consistant. Also make sure the lawyer you get has the financial resources to go after the other party. You can bet the other party's insurance lawyers will fight like hell, and have the resources to do so.
Just make sure she lives in a one party consent state...or it might be illegal to record conversations without the other parties permission