I've got an old flight case briefcase (courtesy of an old 80's NAMM job) that houses my cables, two sustain piano style pedals (taped together), mp3 player, music and lyrics folder, guitar tuner (always have one in case your guitar player forgets his!), spare reading glasses, mikes, stand adapters and a bag full of every audio adapter made...

Then, in the flight case for the G70, oversized (so it fitted my G1000 lengthwise and K2500 depth-wise), I can get the music rest, FC-7 and EV-5 expression pedal, along with dust and rain covers, towels and rubberized shelf liner (the best thing in the world to stop pedal creep!).

They both fit (along with the keyboard stand and mike stand) on my folding dolly. As long as I don't need backline for a gig, it's a one trip job...