Camping World are in cities. You should be out there camping! There ia a list for dump stations throughout the country.
Can only camp until you gotta dump....lol And not all CW's are in cities (or at least what I call cities). Maybe towns. But around here, for the most part, there are not a lot of optional dump stations that aren't at campgrounds/rv parks...
Luckly I have a CW about 10 minutes from my house. I use it once a year after labor day camping with some friends on their property. Roll in about mid morning on Tuesday. Throw 'em 5 bucks and I can take all the time i need to do a nice through rinse.
If your looking for other places, I know a lot of Pilot/Flying J's have dump stations as well. Sign up for one of those key chain membership club thingys and you'' save a few bucks per use.
Your CW charges you?
Well there is a camping world inside an RV dealer about 10 minutes from my house. Its called American RV. So this dump station may or may not be part of the camping world business.