Alternatives to free standing/perm, attchd shade structure?

When I am at the beach, I am mostly dealing with wind and rust. that is why the simple design. Plastic poles and ropes to hold every thing tight.

Yes there is some pooling if it rains. I have been thinking of adding another pole next to the camper to help with this. I still have not found another design that suites my needs.

Thanks for your questions.