I actually prefer (in fact - have to) pick up the bag at the connecting airport, and not the final destination. Will fly UX from DCA (CRJ 550), so presumably my full size rollaboard won't fit. So trying to gauge what are the chances they force my bag to be checked to the final destination.

P.S. Looking further, CRJ-550 seems to have more space for carryon bags than CRJ-200 (which is what I am used to).