There is an AA check in area under the main floor of the Grand Hyatt (not the old Hyatt) hotel at DFW. When I stay at the Grand Hyatt, I ride the elevator down from the lobby and walk around the corner to the AA check in. It has a kiost, check in desk and all that stuff. The security lines are not far away.

If I have baggage I pay a Grand Hyatt porter to take them down for me and that person heads to the kiosk and does the check in for me and hands the baggage over. I live far west of DFW airport. If I have a really early flight, I stay over at the Grand Hyatt the night before.