Will travel, how to keep my collection safe?

Often our collections are stationary "at home", but since in a travel scenario (especially when moving), what's the best way to keep your collection safe?

I do not have a binder, and I don't store my cards in them. However, I do store all my cards (very minimal amount, around ~15 cards or so) ALL in one sleeve, and stored in those UltraPro "Cardboxes" (NOT deckbox) which hold 42 unsleeved or 21 individually sleeved cards), padded with bulk.

Then I store those cardboxes in a standard UltraPro deckbox because they fit.

What could I expect in travelling with it? (luggage placement, ???) What can I do for additional protection? Should I just sell and re-buy my collection when I land anew, or no?