Mark, I see you have a 2016 model. It's possible that you will be lucky, and that salt environment will do you no harm. My bet is that with beach camping, if you don't perform some aggressive preventative maintenance programs for filiform corrosion, you will learn about that corrosion in the very near future. (Galvanic corrosion is an issue in a salt environment also. AS uses dissimilar metals and in places not easily washed with fresh water--so depending on the amount of salt moistened air your trailer is exposed to--that's a future problem also)
We still camp near the beach once or twice a season, but only after I performed a number of preventative steps on the trailer. Again, many ideas are talked about in the thread "corrosion problems with new Airstreams".
However, the trailers were bought to use and enjoy. They will last a long time with or without corrosion.
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