If this marina/campground has 100 meters, then they are probably metering power to their tenants rather than including it in the site rental fee. I'd also bet that these meters don't belong to the power company, but to the park itself for the purpose above, and aren't subject to the power company's meter fee. That's the way the RV park we live in part time operates. We pay a $2/mo meter fee plus the power we use at the park's business rate directly to the park, not the power company. The $2/mo meter fee is to amortize the cost of the meters over time.

Go over to the Coyote Blog and ask the man; he answers Email.