Oh boy...
We just got back from a weekend outing...and that brand new in line surge protector kicked out because of low voltage, so I guess this merits a closer look. That voltmeter was all over the place, and much of the time it was on the low end.
We had a retired master electrician next to us (campers are a friendly bunch, aren't they?), and when I told him I was monitoring the voltage and it was very unstable, he came running with his Fluke voltmeter.
The campground had been poorly wired, 30 amp, but not stable at all.
I had a very lengthy and interesting talk about campgrounds and electronics with him, resulting in additional surge protectors to the tv and dvd player...and I think more measures will be forthcoming.
327RKS