im 31 and my dad left when i was 3. my mum has no idea why, apparently he left a note on the table when we were out, they got divorced and he wasnt seen or heard from again.
she wont blame you, i have never blamed my mum. we are as close as we can be and we have a brilliant relationship. she's my best friend 
however, my mum never met anyone else, and things like fathers day in school, guides, brownies etc was quite tough for me. while all the children made fathers day cards, i had to sit by myself and do something else. also when people always asked "what does your dad do then?" i had no way of answering and found it really uncomfortable. i also, from the age of 18-26, found it really hard to deal with and was quite bitter about it too. i went off the rails and got depressed, and him abandoning me was what i kept focussing on on my "down days". there was a period of time where i thought it was all my fault. i dont think that now... im bloody great and he's missed out 
im not saying that this will happen to your dd, im just trying to say that when she's older, she might think more about it, and she might have some of the same feelings i did.
im probably not helping in any way by saying all this... but just wanted to give you a different perspective.