I like a product called an "RV Underskirt, however mine tore off and I've got to re-do the attachments (I recovered it) this is a woven fabric that streatches between towed and towing keeps what is below, below, and what is above above.
blue ox used to list 'em, mine is a Blue Ox I think roadmaster has 'em to Name may be different than what I call it
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