We usually keep our water tank topped up so we can boondock or drycamp whenever or wherever.
On laundry & human wash day (once every 7-10 days) we'll stay at a commercial campground and fill the water tank before pulling out. If we get low for whatever reason, I will ask at the gas stations if we can use their hose bib to fill the RV water tank. Have never been told no.
Most of the government campgrounds in Yukon have handpumps. They also have signs advising to boil the water before consuming it. Haven't ever used the pumps so don't know much about them.