I know the best kind are the ones which would be wired into the system, but saw this today and wondered if it would be any good. Is this a "better than nothing" or "you get what you pay for" situation...
I will admit, I use my surge protector to monitor polarity, Twice I have found errors and picked another spot. Both were State Parks, one in IN the other in IL. We camp off season so we can usually choose our camp site.
Now for the real world, if you arrive at a campsite with the family on a busy weekend and are assigned a campsite, there is not much you can do.
Explaining the issue to a Ranger or summer help probably will not help much.