what should I do ?

So I'm 22 weeks today and I'm from Alabama, I live in Alaska because I got married to my husband who's in the army, and we will be here for two more years. My parents are planning on flying up for the birth of the baby along with a few of my husbands family. I was wondering when should they come because we all know babies can come whenever they want. Everyone is texting and calling me to make future plans on when to come. It would mean the world for my mom to be by my side while I have my first child and I kind of need her support I just don't know what to do. Suggestions ???