Hopefull "roost" can chime in on how the water level is that time of year . I've been there in the off season and from my trips . The water never came up to a real high level . My buddy at the time had a 19' ski centurion and managed to park it on a rock bar at around noon right outside of Big Bend Rec. area thats just south of the casino's . You could very well be OK to go and the water could come up high enough . Me personally , I'd wait till they start letting a little bit more water out during the day . BTW , "turbo350r" needed a new prop , prop shaft after his shin deep rock bar incident 
Got any pics of that prop !
-beerjet-
The best entertainment on the river at Thanksgiving is riding dirtbikes across it! That late in the year, the river's so low I've actually ridden from Nevada to Arizona south of Avi. If you're dead set on boating, hit the lake. We'll either be at the Shack riding, or headed to Utah for some "free range" riding.
See ya'll early next Spring.....
