The Perfect Fly Store can provide a custom fly selection with flies that will match the insects and other foods the trout are feeding on at the time you are fly fishing the streams and lakes of the park. In order to match the hatches with the right flies, one would need to email or call us with the approximate date of arrival, number of days you will be fishing, and number of anglers fishing, and budget dollar amount you would like the selection to include. We can do this for one person, or if two or more anglers would be fishing, we can divide them into separate packages. If you prefer so, we can include a fly box (four different sizes of 2 sided, waterproof fly boxes) for the selection or each selection is you purchase flies for more than one person and want the flies separated. The average cost of the flies is $2.75 each. The fly box cost ranges from $17.00 to $19.00 each depending of the size. We label all flies so you can easily identify them, or if provided in a fly box, we can provide a index type labeling of the box so you can easily identify them. Our Perfect Flies, many of which were developed to match aquatic insects in Yellowstone National park, look much like the real things and provide a much higher percentage of hook ups than the standard or generic trout flies. To place an order, call us at 800-594-4726 or email us at sales@perfectflystore.com.