Few items in the tackle box get an angler more excited than a lure
The evening will probably be cool, so jackets or sweaters are also encouraged
A stripping basket helps manage fly lines, and a chest pack holds fly boxes, leaders, tippet material, a hook sharpener, and your license
A four-weight rod can do great casting single dry fly mayflies on the cutthroat waters in and around Yellowstone National Park, and might be the first choice to do so, but if the oh-so-frequent southerly or westerly winds kick up, turning over a 12-foot 5X leader with a four weight is as hard as getting a chicken sandwich at In-and-Out Burger
If you want a bait finesse special that emphasizes lightweight and response, use the "Roro SIC Ceramic Ball Spool Bearings"