What day of the week are you arriving and how old is your daughther are two other questions that need answering.
Friday and Saturday nights these areas may be more bustling with activity, so may feel safer.
I've come back from EuroDisney on the last RER train back into Paris and not felt particularly bothered, even with Disney shopping bags that screamed "Tourist - mug me!".
I've also arrived at Gare Du Nord around 11pm on a week night and stayed at a hotel in this area. Just like anywhere, if you see something that you aren't comfortable with, cross the street. However if your daughter is young, you might want to get a taxi to your final destination just for your own peace of mind. I don't think there would be any problem but you have to decide what level of risk you want to take.