Your first campsite should be outside your house on your driveway. That way if you forgot anything, it is close at hand!
We decided to not use the on board water tank to eliminate the maintenance associated with it. We carry two gallon jugs of drinking water from home. Then if we need more for the Porta-Potty or to wash dishes, we get some at the campsite. I used the tank when we first got Homelet, but then reconsidered and use the above method now. I placed two gallons of the pink stuff in the tank and then drained what I could. I plan on disconnecting the water pump.
Our grey water tank is a 5 gallon bucket outside the rig.
A charter member of the Buffalo Plaid Brigade!
Whether you think you can or think you can't, you're right.