Full hook up?

Some here make it sound like doing a full hook up at a FHU site takes forever! DH hooks up electric, then water, then sewer when we arrive at a campsite in less than 5 minutes, tops! We keep black tank closed until full, and the grey water open until last night, as another explained. Before we dump I fill the Black tank through the toilet completely to create a stronger flow when the tank is opened. DH does black first, then grey to help clear the hose. When he's done, I put toilet chemicals in and put about a gallon of water in the closed grey tank. He then unhooks the hose from the RV and rinses out the sewer hose again. It's not time consuming at all. We almost never travel with our water tank full. Water is very heavy (over 8 pounds a gallon!) and we just don't need the extra weight. We carry 2 gallons of water to use, if necessary, for the toilet or for drinking. If we arrive at a CG and don't like the taste of the water, I just get some bottled water at a store. Been doing this for over 45 years and it has always worked for us. We almost always stay at a traditional CG with at least W/E hookups. We dont boondoggle. DH is a disabled Vet so we can now camp in military campgrounds State Parks are our secondt option. Then private ones. We feel it is right to support campgrounds so they can stay in business, not be turned into housing developments! It's getting harder and harder to find a site - if many more CGs 'go under' there will be no place left. We are fortunate to be able to do this.