Conditional Checkout Fields & Edit Checkout Fields for WooCommerce

What I need is this:

If a customer selects the option “Attending a Workshop” on a product in their cart, the cart/checkout should automatically switch to Local Pickup as the only shipping option.

This should work at the cart item level, not by category, since one product may have multiple categories.

If any item in the cart has “Attending a Workshop” selected, then all other shipping options should be hidden and Local Pickup should be forced/auto-selected.

In short: I need cart logic that looks for a cart item flag (“Attending a Workshop”) rather than a category. If the flag is present, Local Pickup is enforced.