Not on salt water ourselves but my understanding the SW package also has things like sealed performance foils and/or strakes, and some of those types of features. Along with probably more thoughtful anode brackets, I kind of think the dealers were saying that to you to close the deal. I guess I just assumed if someone was to be on saltwater they would only get a SW package. I also find it interesting that in addition to the dealership giving you that particular advise (which I question), that they additional are of no help with your bracket concern. D’oh!
My bet is you’ll need to be a bit more thorough with rinse downs, and do them more often because of needing to get in some spots that are not sealed up because you don’t have that package.
We do have a fair amount of FL Bennington owners in here though, and other salt water pontooners, so I’m sure some of them will chim in with great first hand experience soon. Otherwise, congratulations on that QX. Nice!!!