Did it last August. Think I just printed the permit here and brought a couple of copies with me.
Hiking to the the saddle in the bowknot bend is cool. But there is lots and lots of tamarisk down there making it really hard to actually get beyond the river banks. Also not sure what the flows are like now as compared to last August but with last years high water, nice beachy campsites were few and far between and often already taken. Actually ended up sharing one large beach with two other small groups for one night.
And be prepared for bugs. Bring bug spray and citronella candles. A mosquito net mask was also key one night. So cheap and so small I will always bring one in the future just in case.
Paying one of the shuttle services in town to run your shuttle was also worth it.