Ok, I'm going to take the advice of most of you and work from the front back. With the exception of the roof rack. I'll save the rear bumper for later.
I think I'll go ahead and take off the cross bars on the roof rack. I'm planning on leaving the tracks because I don't want the roof to leak. Had problems with the last Jeep ceiling so don't want to take any chances.
The other project on the front end I think will be filling the Fog light/Tow Hook holes in the front bumper. Hopefully that will help push a little more air around the Jeep. I know it's not much, but every little bit counts right?