You should be fine. The TATL/TPAC thing is not an actual issue for most US cities. I know since I've actually booked an award trip similar to yours last year. The agent might raise an issue, but if she does, just tell her to enter the details and let the computer price it out. The computer will almost always price it correctly. The agent will be surprised and tell you that she needs to confirm with her supervisor since the computer may have made a mistake. Then she'll come back in a few minutes and tell you that everything is alright.