Where do you get your water?

For those of you who are on the road, where do you get your water when camping at non-water locations.  Normally I don't haul much water (just enough for bathroom use and hand washing) but if I needed to fill my tank other than at a park or RV park, where do most of you get it?  I use the Allstays camping & RV app a lot, but at truck stops for example it usually only mentions if dump sttions are available.  Nothing about fresh water.  What creative ways have you found to get fresh water while on the road?

The weight of a full tank of fresh water may not affect MPGs all that much, but it definitely can cause sway issues!  If your R-pod is like my 177, the fresh water tank is located behind the axle.  A full tank will significantly lighten the tongue weight.  I will not drive more than 50 miles or so with a full tank for that reason. 

Not sure if your question was directed to me or the OP, Doug, but I do have a sway bar.  But I'm not going to push it.  A full fresh water tank weighs nearly 300 lbs.  You'd have to shift a lot of weight to offset that!  There are a few Forest Service campgrounds in my area that do not have water available.  They are not far from my house (20-40 miles), and I keep the speed way down.

I fill up at home. Usually 240 miles to my destination, 99% highway . My TV is heavy (5000 lbs ), plus I use a sway control, never had sway problems. But a full tank behind the axle can induce short duration undulating (porpoising) over certain parts of highway. They are brief but settle down real quick.

 I don't care for topping off the fresh water from a hose at an unknown source. The campgrounds I use usually have no dump stations. So I tow everything home and stop at a public dump station at a state rest area 9 miles from home, dump the black and gray, and drain the fresh at home on the driveway if anything is left.

I use Clorox spray on everything also.  Usually give my blacktank hose ends a good spray everytime also.