You asked for advice , and so here's mine ;
For a set of such value & relative rarity , I'd be booking a plane ticket to cali , and renting a U haul one way and plan to make a fun road trip of it . Some 1960s roundie color gets busted up in shipping ? Yea a huge bummer but not entirely irreplaceable . Your set gets dropped/smashed/lost by a not so dilligent shipping company employee where are ya gonna find another ?
ROAD TRIP !!!!!!