Hard wired into the rig is the only way to go.
- It's a lot less hassle when setting up or breaking down.
I have my Autoformer hard wired.
- Out of sight, out of mind
Having it hard wired and hidden prevents theft AND it also hides it from the CG owner/manager. Many CGs feel you are stealing additional power and if they see it they may ask you to remove it.
- Ease of mind
Knowing it's down there doing the job and keeping your rig and equipment safe from low voltage, spikes and surges from a CGs inadequate electrical service
Do I know how to hard wire it in? Yes.
Could I explain it to you? Probably, but I won't. I am not that much of an electrician and there is no way I would want to put your rig at risk.
HOWEVER, there are numerous electricians in the MOC and I am sure one or more will be along and only to happy to assist you.