Help with burying a float tube?

[flygoddess]

Every waterproof duffle/storage bag I have bought and that is many, are not air tight. If submerged at all, the inside has got wet and I am not talking the opening, but more the stitching. They are only water resistant. Dropped in water is usually safe enough, but sitting in a pool or puddle, not so much. Newspaper will also detour bugs.

I wonder how the space bags would hold up? I am thinking the elements would destroy them.
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