Wife, 1-yr old baby and I are flying Southwest on a 737-700. Reviews on Seatguru said the seats are very cramp with minimal shoulder room. Seatguru list seat width at 17" with seat patch at 31". I am wondering if a Chico Key Fit 30 car seat will fit.

Also, I don't need the car seat base on the plane right? (I'll check in the base.) Also, since this is an infant seat, I assume I need to install it rear facing???

Lastly, where am I supposed to put the car seat? Window, center or aisle seat? I called Southwest, they said any seat. I got the impression that a car seat can't block any other seat from exiting.