There is a public washroom in the mall that is at the far end of a corner hallway. It is secluded and there are two entrance doors - making it perfect for understall/handicap stall play due to always being notified when someone is coming. The mall is also VERY quiet (it's a mall in Fairbanks, come on), so there is rarely anyone in the restroom itself.
This is just a simple state rec and camp area. There is a large parking lot on your right as you drive in. Park and wait. There are also parking spots near the water. We're cruising... You know what to do ;)