When I moved, the only 2 items to not survive were my R2 Pepsi cooler (the dome cracked) and my Don Post Vader Mask(the helmet cracked). This was in the same UHaul same trip, had some stuff stacked that shifted and fell on both these items. It was the last trip and almost everything was in boxes, since these 2 don't easily box, I put them kind of on top of everything-well-it didn't work.
My advise-don't try to cram too much stuff into huge boxes. Smaller easy to carry boxes work well.
More $$$ items, put those up front with you or in passenger seats, etc. Don't lump them in a pile with everything else.
Watch when stacking, lots of stuff can easily be crushed very quickly with too much weight
Remember if something could go wrong...it might.