First off, welcome to the Wildcat family. And Congratulations on your new rv.
When asking questions many times a photo will go along way in providing added information to our mass of helper members here who are always willing to share their knowledge or at least venture an educated guess.
As for the wiggle wobble it is going to be there to some extent unless all the weight is taken off of the trailer suspension. You can help stabilize the trailer and reduce the movement with added stabilizer jacks and wheel chocks. My suggestion is just use the wiggle of the rv to remind you that you are not at home, but more relaxing to the movement of the open waves...........unless you have sea sickness.
2018 Berkshire XL 40B
Past RVs: National Pacifica 40', Kenworth T300 Toterhome, Jayco Class C 32'. American Eagle 40',
American Eagle 40', Bounder 38' tag axle