Hello, I'm hoping you all can help me w/ something I haven't been able to track down. My wife & I would like to take the kids on a trip. One is 2, and the other is an 18-month old that we would like to ride in lap. Wife & I each have enough FF miles in our own accounts for our tickets, but we would need to purchase a ticket for the 2 year old.

Me - award ticket from my account
Wife - award ticket from her account
2 yo - purchase ticket - but what about unaccompanied minor fee?

What's the best way to get all of this under one reservation & minimize fees?