If you want to travel ASAP then you need to describe and also need to submit the letter which reflects that your presence in family is very important. Letters has to be sent from your family. This is my case in last year and I was approved AP within a day. You even don’t have to mail. You can go to local USCIS office and submit the document package. If you don’t have rush to travel then “visiting family” would be enough but it takes around 2.5 month to deliver your AP in the mailing address which you have given. GOOD LUCK.