The Organelle wants a screen resolution of 1920x1080. Otherwise, you will likely have to edit the XConfig.
I do have one of those little touch screens laying around, but patching PD with one of those seems like a frustrating situation. A mouse may be necessary!
You will also have to power it, so a powered USB hub might be necessary as well, making the portability a bit impacted. Unless you can get a batterypack to powered the whole kit and kaboodle. I have a 8xAA battery pack that I got from Adafruit which works great, but I'm not sure it would be able to power the little screen as well. A powerbank like you mentioned may be the ticket, but it seems like a lot of extra gear when a laptop may solve the solution.
The way I do portable patching is to remote into the Organelle over SSH and patch with my laptop. It's pretty minimal once you get the WiFI setup.