If you travel away from home to a stream you’ve never fished, going to a fly shop to ask about local conditions is a good move. None of these fly shops are going to charge you for that advice, but in karmic terms you still owe. Buy a shop hat or t-shirt, or more appropriately ask what kind of flies the local fish hit on and buy a half dozen of those. Perhaps it’s a form of money laundering but it helps to keep the lights on in that local advice source.