Choosing the right oil is critical for a high-heat environment like an open fire. You need an oil with a high smoke point to prevent it from burning and turning bitter. Vegetable oil or Canola oil are the most popular choices because they are affordable, neutral in flavor, and can handle temperatures up to 400°F. For an even higher smoke point and a slightly nuttier flavor, Peanut oil is an excellent premium option, though you must be mindful of potential allergies in your group.

When cooking, ensure you have enough oil to submerge aproximately half the thickness of the fillet. A common mistake is not letting the oil get hot enough before adding the fish; you can test this by dropping a small pinch of breading into the pan—if it sizzles vigorously, it's ready. Handling used oil in the wilderness requires care. Never pour grease into the lake or onto the ground, as it can harm wildlife and the ecosystem. Most fly-in anglers let the oil cool and then pour it back into a sealable container to be flown out with the trash - don't forget to pack a small plastic funnel to make it easier to get the used oil back into your container.