you can stil fish without sunglasses so i dont think those. You can fish with out waders. You can just wet wade or fish from shore. wading boots arent neccisary since you can still walk around in the river without them. You may fall a few times but you can still fish with out them. A reel isn't the most important since it just holds line. You can have someting else hold the line or just tie it to your rod. You can sorta fish without a rod, not really fly fishing just holding onto line and letting the fly drift. Fly line you need but if you just let the fly drift u could use mono. A leader you can still fish without, not well or succesfully but u can still fish,and the most important is a fly. You cant fish at all without a fly. you can cast but you cant actually fish.