I have a student going, and would highly recommend it.
Is Susan Polgar Foundation National Open worth going?
Good tournament, and she shows up for pictures and autographs (many people there ask her to sign her books).
We attended it the last 2 years when it was held at Livermore, which is 1.5hrs drive from our house. This year, it is much closer to us at Santa Clara. I'd draw the line at 3-4 hrs unless your girl has a shot at the grand prize.
http://www.spfno.com/
Thinking about taking my daughter there but not sure if it's worth traveling several hours to get there.