IMO Only way is out-of-sight and out-of mind.
My 2KW Honda is secured in the bed of my truck bed which also is lockable. My Honda Generator goes where I go.
'NO WAY WOULD I LEAVE MY HONDA 2KW GENERATOR AT A CAMPGROUND' unattended...


I pull it out onto my tailgate at 8AM each morning for three hours to re-charge my 255AH battery bank when camping off the power grid so that we can do all of this all over again the next day/night run off the batteries..
Just how long do you think this Honda 2KW Generator would last left unattended at a campground. Might as well put a sign on it that says "TAKE ME.... TAKE ME"
Every thief carries one of these

You also see alot of CUT HONDA GENERATOR HANDLES on EBAY and CRAIGS LISTS... Just saw two a couple of weeks ago on CRAIGS list. Wonder why they have CUT HANDLES haha...
Been keeping my 2KW Honda secured out-of-sight since 2009
But this is only me talking...
Roy Ken