One simple solution: just put 12 cards from each suit into 4 piles and then hand the piles to somebody else who didn't see which pile is which suit for them to

One simple solution: just put 12 cards from each suit into 4 piles and then hand the piles to somebody else who didn't see which pile is which suit for them to do the card removal and then the final shuffle that merges the piles. So basically a two-person deal where each dealer does a different step lets both people play without knowledge of which suit is the target suit.