A folding two wheel trolley has worked well for me. Mine will fold down to a four wheel trolley as well. Got it at Canadian Tire. On it straps an old guitar hard case with the interior pocket/box stripped out to make room for a mic stand, music stand, instrument stand, music binder(s), and other accessories inside. It more or less stays on the trolley. Bungied on top will be whatever instrument(s) I'm taking. Basically this means I have two guitar cases on a trolley, one with gear, the other with the instrument. I don't like a lot of extra things to misplace so the fewer the things to handle the better.