I don't have any great pictures in the water and the boats are covered up right now. I just took these photos of them sitting on my dock. I used PVC pipe to make a quick rack. Most of the PVC is not even glued together so that I can take it apart and move it around. I only use the long pipe along the bottom that connects the uprights on one side. The other side is open. I live on the coast and this setup has withstood some good rain storms and winds without any problems. Normally I have the rack off to the other side of the dock (not seen in photos), but we are doing some repairs to our motor boat.
I use thick cable locks through the front mirage drive openings to secure the boats to a steel davit. You never know. The covers you see In the photos slide on the boats and then zip up near the end. Sort of like a sleeping bag. With the cable locks installed, we don't zip them up all the way, but drop and tuck the material. Seems to work well. We bought the covers on Amazon. At first I would let the boats dry and then cover them, but found it to be kind of a pain. Now we cover them wet. I was concerned about mold or mildew, but no problems with that either. They dry out fine.
Let's see if I can get this picture thing to work...