Found an outstanding campground in Gadsden Alabama, called River Country
Campground.

http://www.rivercountrycampground.com/amenities.asp

The trolley system is similar to the one in Gatlinburg, it runs all
around Gadsden, not just in the campground.

One thing I found is there is not as much shade as the pictures show.
But they have everything else you would want.
$26. a night or six nights and the seventh one free or $450 a month for
the parking lot or $550 for the water front, where
more shade can be found. Prices include full hook-up sites with cable TV
and high speed wifi.
I intend on calling them back and finding out what their modem is
connected to DSL or cable, but it is fast.

http://www.rivercountrycampground.com/amenities.asp