I have a Schertler Dyn M, sticks on with a clay like putty, it works well,XLR plugs into a Mic cable
and the Mic cable into the stage snake with all the other microphones
but it stows in its own wooden box - so nicely I wouldn't suggest an alternative.
made by the same folks that make the coo-coo clock boxes.
so probably not going to fit in your case, too,
a separate bag or suitcase with cables
is a normal part of amplified music , anyhow.
adding : acoustic instruments are still subject to feed back loops with the monitors
or house sound gear, up loud enough to ring the soundboard with a pickup attached to it.
a magnetic pickup on a solid body , well, that's why they were invented, still feedback reducing
'till you hold them in front of the speaker.
writing about music
is like dancing,