First off if you have nothing to say about trash then say nothing.
We like the places that pick up trash or have dumpsters throughout the campground. The other option we like is when the campground supplies a trash can at every site. This way is does not matter what time they pick it up, it is always there.
We use tall kitchen bags in out trash can that we keep outside since we are rarely inside. We use grocery bags in the bathroom and under the kitchen sink for little things in the morning and at night.