In anticipation of campsites without electric service, we purchased a portable generator that supplied 2600 watts service, but found out it wouldn't start our trailer's air conditioner. I even installed the “hard-start” capacitor on the A/C, but it made no difference. We left the generator behind as we simply decided to stay at campgrounds that had electric service and not be without air-conditioning. When we stayed at my cousin's farm just outside Pleasant Garden, North Carolina, we hooked up to the house water with a garden hose, but we used a borrowed 7500 watt portable generator to run the A/C at night. We quickly found out how far five gallons of gas goes and how long we have to wear ear plugs.
We stayed at commercial campgrounds that touted "Free WiFi," although they neglected to mention the Internet connection was free only for the first 60 minutes! Many commercial campgrounds also brag about free cable, but one we stayed at in Winchester, Virginia, had such lousy analog cable reception we used our trusty little antennae instead! Free HDTV beats free, fuzzy, indistinguishable colors, and bad sound any day.
We met a campground host who roared with laughter as he recalled RVers who hooked up to the full-service sewer hookups for the first time and then left their black-water drain valves open as if they were at home. Toilets in RVs and toilets at home operate quite differently! The expensive trips to camper service locations that were needed to rectify the solidified, blocked waste holding tanks could have been prevented if the owners had read their manuals. Don't open your black-water drain if the tank has no water in it, or, basically, never use the toilet without substantial water in the holding tank. Most manufacturers recommend at least one-third full before opening the black-water drain valve. In this case, not reading the manual is not only expensive, it can be embarrassing.