They are cleaned regularly and we have few complaints. They can smell in hot weather but it is mostly when guests do not use them properly, and even with adequate signage people leave the seats up.
As we are an eco campground the toilets are waterless, a system called Clivus Multrum, helping to save a precious resource (the water). If you are a parent with small children it means you can relax. We keep non essential vehicles off site to make it safer for the kids at the campground.