If the campground is providing low voltage, you are going to continue to have problems no matter what you do in the trailer. That is why many of us carry multimeters or other voltage testers.
The fix for this lies in the campground office.
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'11 Cougar 326MKS loaded with mods
'12 Ford F250 SuperCab 6.7 PowerStroke Diesel
Amateur Radio: KD2IAT (146.520) GMRS: WQPG808 (462.675 TPL 141.3)
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