if you pay to camp they let you use Room #1 (i think) to use the shower or restroom.
I pulled my little camper last year and you can also camp for $10 a night but there is no electric or any hookups for them. You are basically just in a large parking lot.
It was a good time last year. they have a fire pit out back that everyone congregates around and a decent restaurant on site and it is not far from Jasper. I did hear rumors that others were camping less than 10 miles away with electric for $10 a night too.