Hello Alf
I'm using a Pi4 4GB remotely (headless) without any problems using VNC. The VNC software allows me to operate (WSJTx in my case) remotely from my pc (Window), laptop (Linux), and my tablet and phone (Android).?
Don't forget to enable the interface in PiOS for VNC, it's not on in new installs by default.?
Maybe I've been lucky but I've never had a problem with VNC.
Good luck with the event.
73 Glen
Glen - G0SBN