We usually park across the river (north side) below the over pass and make the ferry across. The turn off is on the northwest side of the Riverside Parkway and 5th Street overpass by the tank farm. Ferries and walking the island are a bit of a pain, but beats the bums, dogs and railroad.
To be honest there are new waves up stream of 29 Road that rival it and are not as shallow. At the top of the wave train are some small, but entertaining standing waves. Below it are a series of holes that can be shallow, but decent side surf. The very bottom hole, river center is meaty and fun, but so far seems to be deep enough after some accidental probing by a friend. Word is to stay out of the bottom hole river left as it is shallow and meaty, its also good advice due to the wood lining the side.
If you feel like going today or tomorrow, hit me up.
"I plan to leisurely advance through my existence" - Terry Fuhrman 1991