Hello EHesse, I just did a quick search for you too. Many posts talk about running more than 5 families so here's how to use the 5 player slots available in the game. Try this. If it works EXCELLENT. If not, it was painless.
If my response was unhelpful then it can always be deleted and my feelings won't get hurt.
1. When you first open the game you should get a screen that looks similar to the one below.
2. Click in the Current Player box to begin creating a new family. Just type a name in there, select Play and you're on your way.
Continue this process until you have the number of families you want, up to 5 families.
3. To play with each of the families you can access them the same way, by clicking in the Current Player box and selecting with family you want to play at that moment.
Welcome to the game AND the forum! I hope you love it!