They should be fine, DL is very safe, they have alott of security everywhere. When I was a kid my parents would make us meet at the castle every 3-4 hours and this was way before cell phones;;)
I live in San Diego and if I were you I would get a rental car as long as driving in trafic does not brother you to much. Going by train and then taxie might be all right in the way up but a women coming home late by herself just does not seem as safe as a car. Just my 2 cents. Whatever you do...
Had dinner there in May and we thought it was very good. We are planning another trip late November. I don't know if we can pass up BTRB. Sure it's not going to win any cook-off awards but for DL it is good food.