If I were to rent a slip, would you allow a canopy to be installed (at my expense) to keep the weather off my boat? Its a 24ft. pontoon

This is the review website, not the marina itself. However I have been renting a slip there for years and while they are pretty laid-back about what gets attached to your slip I have never seen a canopy. I think there may be a liability issue if it wasn't installed right or damaged someone else's boat. Just my .02

Oxbow Marina will not allow you to erect a canopy at the slip rented.

I agree with Peter D