You said something about the number of tents.. Many campgrounds LIMIT the number of tents on one site.. You should have mentioned.. And since it appears they were spilling over onto your site, REALLY complained.
Of course it could be worse.. I normally use 2 electrical cords (one 20 amp) on 30 amp sites... They complained so I condensed down to one cord.. The complaint was I was pulling so much that the voltage was dropping.. Well, true, but it is WORSE when I use one cord. Oh well. They get what they complain for.
(The main cord on my RV runs through a Hughes Autoformer hidden in the RV,, The aux cord does not, so if voltage is low, current is increased to make up for it)