I think it would have been more prudent for them to come out and say, we are becoming an adult only resort where people can escape from their own and anybody else's children. Much more like a Sandals Resort, these are not 'swingers' places, heck most of them are not even nudist, let alone topfree friendly. Never saw anything like that at the one's I've been too.
Never been to Deseret Sun, but a friend and his wife frequent there, and he mentioned they go there specifically because their is no "hanky panky" (is that still even a word), not exactly their scene. No young kids is just a bonus in their minds, of course they said they never saw any there in all their times before the policy change.