i wouldn't say anything in the CB creeks is mandatory. class IV boaters should have no problem with the Upper East. start here, then go take a peek at OBJ and see what you think. you can easily walk the whole run. at low water, OBJ isn't really that bad (you might think i'm crazy, but it really boats alot easier than it looks). medium to high water and it's a solid V though. after you see a few boaters run it, you'll probably feel better about it. Daisy's sweet too, but harder to scout - it's more a read and run V- creek (you should scout Big Wood and Rip your Head Off before putting on though).