Our campground charged us 20% more than the going rate. We are seasonal campers and do run all the ad ons. We do not have a washer dryer but our monthly bill last summer was around $132 a month. Still higher then stick,n brick at $124 with central air. You should see what the power company charges. I always thought that we were paying for all the campground lights. Good luck that sounds way to high for that short of a stay.
Jay and Linda