DL's seat maps are generally pretty good about indicating which rows are over the wing and which ones are not. Also, a good reference guide is SeatGuru.com
. This will help you avoid seats that won't recline, lack windows in "window seats", have a little extra legroom, etc.
Here you will be right at the leading edge of the wing. If you wish to sit at the trailing edge to have a better view of the flaps and such, I've sat in 29E before and it's pretty good. Just a heads up - the farther back you go, the louder it will be on the MD-88. Stick to the E side, as not only is the 2 side of the 3-2 configuration better, but the seats on this side also offer a little bit more legroom. (Once you get onboard, you will notice as you move back, the rows no longer align)
22A is right at the trailing edge of the wing on the 737-800. My guess is you won't be able to get seats ahead of the wing since those will probably be blocked off as "Preferred Seats" for Medallions and Full Y passengers and those seats won't be available until the day of departure when you check-in. If you do move forward, avoid 13A since that seat is missing a window.
One last piece of advice: switch to the DEF side on the return flight. The reason is heading south, with the E seat, you will see everything west of your flight path. On your return trip heading north, if you are in the A seat, you will see the west side again. Just a recommendation there.
"Let's Roll"- Todd Beamer, United Airlines Flight 93, Sept. 11, 2001