I would advise bringing gear that you can move around with (headphones, earphones, portables). That way you can also demo/compare gear.
This. Bring the gear you know best and try to pack light. The less you have to lug around the floor the better. For RMAF I had my DAP and M-80s on the show floor. I could run digital out of the DAP to a desktop DAC with my music, use the DAP as a source for headphones, listen to any demo source with the headphones I use 40 hours a week, and I didn't have to worry about carrying a ton of gear in a bag.
My headphone at home is the Ether and most exhibitors had a pair or two for demos, so that also made it very easy for demoing the new toys.