How much will my stuff shift when pulling a TT?

Use shelf liners like this for shelves:

http://cushycupboards.com/

I've a collection of hard to break dish and drink ware that I purchased when I first began camping. I'm sure they'll be fine in an RV. Corelle; acrylic glasses...you know the type.

Don't know how strong the locks are on your cabinet doors but you can always beef them up if you feel unsure.