Let me share some of my concerns with the Family, I know that we are anxious about choosing a Campaign and start fighting as soon as possible, but I would advice to wait.
They named only 10 campaigns so far, it is clear that those will be completly full at the first moment.
We will be randomly placed in a Campaign by default, we have 1 change for free.
The cost of the change after that is 15,000 AP for the first month.
After the first month I heard the cost is about 150,000 AP! If you leave before the campaign ends.
So, considering that our Family is HUGE, if we get a full Campaign we won't be able to play together because of number limitations of it, and they are making it a way that once you chose your Campaign you will probably want to stay on it, so I would strongly advice to wait for the next Campaign names after launch, let's say something like 7-10 days, and then choose carefuly a Campaign to consider home.