Nothing crazy, just print 4 boxes and 4 lids for the tiles and meeples. I included two versions of the lid. The thicker one is prettier but need to be printed with a smaller nozzle than the one I used. Also print one box and one lid for the gems, and the other one for the treasure tiles.
If you leave the cardboard in the box, it fits quite nicely in the length.
Don't forget to turn the lids on the right face. You won't need any support.