Yeap,
Steve S. is right, anything long term in water will cause problems. By long term I mean months not years.
You leave the pipes out there year around, S/S would be best. Sorry I did not tell you that part.
I would suggest attaching your hoops ( very nice by the way ) with S/S self-locking (nylon) nuts and bolts to your dock. Remove them and haul it out. Re-attach when you put it back in.
You may also think about mounting wheels under it. Nothing fancy, something solid, with a wide track.
( remember, muddy bottom )
Or build a long roller with some large pipe with drain holes all around may be best, so you will not drag it in and out.
Either way make the axle fit loosely so it will not rust or seize up on you.
Just another thought.
Hope this helps,
be safe,
Richard
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