Are there any manufacturers who custom build Truck Campers?

As soon as she saw the video where you have to take out the bottom container and "pour" the stuff out manually, she said NO. lol. Also, she is imagining sitting directly on top of a container that holds all that waste. Its probably no where near that bad...

But I'm open minded here. Is it really better? I would have thought since I have to dump grey water as well, it's not really all that much trouble dumping black water first through the same tube...

Also, where can you dump other than the RV dump stations? Can you carry them into conventional toilet and dump there?