I launched at 1.81 back at end of July. I would rather have had a 14ft raft than my 16ft cat for sure. I learned that contrary to one expressed opinion you can indeed go too far right when entering the rapids at Waterfall, as I got hung up briefly there on a rock at the bottom. At Tappan Falls I was not fast enough making a move left or right before a big rock at the bottom at the low flow. Lastly, there is a not so nice hole for IKers below Devil's Tooth. We had one ducky swimmer there that got recirculated a few times.
Best trip I've ever been on, and not just rafting--anything! You'll have a blast.
If you like to hike, soak in hot springs, or fish and hunt (Chukars), it would be awesome to do a layover or two to have some time to further explore the wilderness.
Enjoy your trip