jdavis3152003 said:
That is what I thought so if we are parked on land, then I have to tow my little home to a dump site every couple of days. Sounds extremely inconvenient. Is that what everyone else does?
There are many strategies to use.
In most cases people only stay in one spot for 2-3 days, and water disposal is less of a problem. A degree of conservation and taking showers elsewhere both help.
In practice, some people dump grey water illegally, though I wouldn't recommend doing so.
Some people use blue boys, that is, portable tanks for wastewater. They work for short distances and low speeds. http://www.campingworld.com/shopping/product/thetford-smarttote-and-smarttote-lx-portable-waste-tanks/6073
Sometimes when staying in one spot I've made arrangements with a local septic pumping company to spot a 300 gallon tank on site, which they empty as needed. It's expensive but works.
A few people have tanks set up in their cars or trucks and some sort of pump arrangement to handle the wastewater. I've done this too, using a 30 gallon plastic oil barrel in the back of a pickup, and a cheap pump. More sophisticated approaches are possible.
Some people have their RV set up to use greywater for toilet flushing, as a conservation measure. This helps somewhat, but is maintenance intensive, as an extra pump is required, and the water must be filtered or the toilet valve will clog.