Originally Posted by
Steve_ZA
Your arrival at DFW would be domestic due to completing USA immigration Pre-clearance at YYZ. If you were HBO then you could just proceed to the onward departure gate.
ETA: Yes what you said
I think that's how this is going to pan out, may put my smaller carry on inside my larger one or take my emergency duffle bag in it and then check the larger one on the return as I have requests from the kids to grab them new trainers from the outlets and perfume etc for the Mrs!