Another addendum to CoEx overhead bins...

They are smaller than the bins on CO's mainline fleet, so some things won't fit (like roll-a-board luggage, etc). Take it to the gate anyway.

The bags that are gate-checked on CoEx are returned to you at the gate upon landing, no need to go to baggage claim unless you have already checked bags at the ticket counter. Fewer people on the plane make it possible to return them at the gate - a nice courtesy since you may have a connecting flight on a big jet and be able to carry those larger bags on board.

As for pre-boarding elites...generally speaking, they will do this if the plane is full. If there are only a handful of people on the flight though (common in some smaller stations), they'll likely board everyone together.