Several years ago we did a Carnival Caribbean Cruise. One night in bed, we felt the ship make a movement. I asked my wife if she felt "that" and she "Yes." I said, that feels just like the travel trailer wiggling in the wind when we're in bed, doesn't it? She said, "Yes."
Ever since then, when the trailer wiggles and we're in bed, I now ask her, "Did you feel that?" And her (now) answer is, "Yes, it felt just the ship that one night on the cruise!"
Kind of like on that ship, we just got use to the camper making wiggle motions and simply enjoy it now.
Tighten, secure, fasten, they still wiggle, unless you take the wheels completely off and put the entire thing on a block foundation.
Enjoy the cruise! The "LAST" good night sleep you ever had was probably the night BEFORE your first child was born! As long as you have kids, even when they become adults themselves, you'll NEVER had a truly sound night of sleep again!