Our Carriocca 635 is the same, it rocks even when the dog (a Jack Russell) jumps off her bed & goes for a sniff around. I am considering getting caravan style corner jacks fitted for really windy spots. Otherwise, seek out sheltered parking spots close to rocky outcrops or surrounded by trees - BUT NEVER underneath trees. parking under trees in the wind & rain leads to a constant stream of clunks, bonks & splatters as bits of tree & water splatter down on your roof all night.
Make fun out the rocking to the kids, pretend it's a fairground ride & laugh about it or they will pick up on your fear & amplify it. Caravans may blow over, but your MH will weigh far more & that weight is mostly low down too. BTW, I prefer to park rear to the wind as I get less draughts, there are no doors in the aft end & the cab has heater vents as well as many door/ window seals that may not seal as well as they should.