Looking for a Place to Stay in Our Camper

Hello. We are painting contractors who need to stay a week to begin and complete a job. We would be coming towards end of May.  Our clients have generously offered power to our little 16 ft trailer, but we are a bit reluctant to ask if there’s a bathroom to use (in their home!)  I can find no useful information regarding camping on Thetis Island.  All we need is a regular plug for phone charging and an outhouse would do the trick.  We don’t know the island at all, but our client is on Pilkey Pt. Rd. Hoping to find a place to stay close by. If there is no campsite. do you know of anyone who could supply us those services? 

Thanks so much.
Cooper and Susie Gee
itsonlysusie@gmail.com