There are weeds on the Missouri! I heard a guide say “it is what it is”. I think this is a great quote because “it is”. Your going to have to clean your flies often but you can still get them. I had success on a UV Tan Chezch and a size 20 Rainbow Warrior. Keep in mind that it is the end of August and those fish have seen a lot of flies. Not a lot of bugs either. A few tricos, caddis, ants, and I did not see a hopper today! They work though. When fishing is tough and I get to witness a 15 year kid stick a 19 inch rainbow-is it really that bad? We caught 6 fish today, picked off a lot of weeds, and had a blast. Thank God for the World Famous Missouri River!!!