J.B.
i know how you feel i will be flying next month with my 15mo daughter too for 7 hours. though my hubby is going and she is getting her own seat. i did fly with my daughter when she was 7mo to wa. where she sat in lap (and thank god the plane wasnt crowded so she could be in the seat next to me). what i did was i brought a few of her quiet toys that she likes and i saw you said you were taking the dvd player (good idea), and lots of snacks (though my baby was more amused with the window and folding table to bother playing with her toys). and what i did about a carry on was only take one bag (her diaper bag that had my wallet and everything i and her may need for the flight) and a backpack so i had a free hand. i think at her age its better to have them in their own seat because they want to run and be down not have to sit. so it kinda helps to have them straped in haha. you may go purchas a new toy that will occupie her (im going to get the leapfrog little touch pad). oh for the diaper changing shoot if you have no one in the row with you lay her down right there. but if there is someone there then what i did was walked to either the front or rear of the plane laid a blanket down and changed her on the floor (or use open seats if its not too packed). oh thats makes me think that may be an option that if the flight isnt packed then you may be able to move seats to where your not sitting by anyone (you also may be able to do this at the desk where you board your plane) good luck i hope your baby flies well1