After much searching I found how to hide the panel.

dbus-send --print-reply --session --type=method_call --dest=org.gnome.Shell /org/gnome/Shell org.gnome.Shell.Eval string:'Main.panel.actor.hide();'

Works great...

However - I also wish to hide the bottom panel or workspace.

Anyone know what that is???

I tried Main.Workspace.actor.hide() and that did not work.

Thanks,

jerry