psilocybin is technically a zwitterion; it carries a partial positive charge at the terminal amine, and a partial negative charge at the phosphoryloxy moeity.

swim has done both alcohol extractions and a/b

your best bet would be to acidify it with vinegar, then basify with ammonia (keep the pH below 9, and work quickly...psilocin degrades in high pH) and extract with dcm (warm naptha might work).

(the product will be psilocin freebase, you'll need to store it in an amber bottle. you can cap it, or mix it with some sort of acidic juice.)