You could check with
Wilderness Village NW of Rocky Mountain House. They have around 180 members that leave their units on site for winter camping. Washrooms including showers and the lodge remain open. This will be a real benefit if it gets cold. Unfortunately the hot tub is closed due to Covid.
It is pricey but firewood is included and the lodge has books, puzzles and games although they also may be off limits due to Covid. They even set up a skating rink but you will probably be too early for that.
People dry camp and use the washrooms. There are taps where you can obtain water for cooking and washing. Take appropriate containers.