Hi,
I vote for Moose Jaw as well. There is a lovely campground on the south side of town called River Park Campground.
I'm currently at King's Acres. Low voltage is a problem for their 30 amp sites, so if you end up there pay the extra fee for a 50 amp if one is available. They charge for their showers.
The Walmart does allow overnights in Moose Jaw.
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.