Ordered parts for pc, should i wait to build?

I've recently ordered all the parts for a new AM5 build (parts from newegg and amazon), but I'm moving across the U.S. in a month from now and not sure if I should wait to transport all the components in their OEM packaging and then build it once I'm moved in, or build the pc entirely and transport them put together? My main fear in waiting is if one of my parts is dead or not working then I'd be out of the 30 day return windows from newegg and amazon. (I'm also fearful of damaging the fully put together pc in transport).