I am in at site C, they revoked my request for a site with electricity if I am tent camping, even if I agreed to pay the same cost as a camper. I just wanted an outlet to run a fan, laptop etc...Outlet is way cheaper than batteries.
There are outlets in the pavilion, right next to the group camping area...guessing they'd frown on running a cord to your tent, but in the evenings you can run your laptop there. Others have done it...