The CRJ DFW base is open and as far as I know isn't shrinking. The ERJ DFW base isn't open quite yet. As far as holding it the CRJ has been having position notices about every 3 months. If you can't hold DFW right out of training just wait for a position notice and bid any base you like, any new hire can pretty much hold any base but all new hires will be on reserve until resignation, termination, or death.