The trailer cover, with a layer of painter's drop sheet under it, does a good job but I'd love to have a rigid structure.
Ron - So to be clear you use a plastic painters drop underneath the trailer cover? So essentially two covers. 1. Painters drop to keep the trailer dry, then 2. Actual trailer cover to protect against UV, and to keep out any light stuff like fall leaves, etc. Does the use of the plastic painters drop help stop the green algae from growing everywhere?
What trailer cover do you have?