Unless you like washing your boat a few times a week, I would not suggest a sling at the GYB. I had my Grady there and between the white birds in the rigging at night and the constant salt air, it is a corrosion nightmare! Dry stack is the only way to go if you are not a fanatic on cleaning. Good luck with your choice.
I keep mine inside a storage place in League City. It's nice having it in a controlled access compound, inside a locked building. The nice part is that if I don't fish for 6 weeks it's just as clean as when I put it away. Moved it to their new place in May when I got a new trailer that was taller. place has 14' doors and plenty of room to back in between sheds.
League city boat and rv storage. It's on 646 about 4 miles east of I-45