Hayward? To go to Vegas? That's a hike. I'm guessing you meant KHND?
Same here. It ended up being the cost of ground transportation being significantly lower than the fees at KLAS that did it for me.
IMO, teaching pilots how to fuel a plane is the #1 thing that should be taught in private pilot training that isn't in the PTS/ACS. Primarily because I think there have likely been crashes where a fuel stop was skipped because they weren't comfortable with self serve, but it has the nice side effect of enabling cheaper flying. I save over $2/gal by going to a nearby field and pumping the gas myself when I fuel up. Since I'm usually buying 80 gallons or so and it's close by, the extra flight time more than pays for itself... Plus I get to fly more!