I havn't been lately, but there are usually some walleye below Turners Falls dam downstream a mile or so. Boating would be very risky between the dam dowmstream to the mouth of the Deerfield. Better to work that from shore, although you can fish the mouth of the Deerfield by canoe.
I don't think they have depth charts of the river. But if you find one, please let me know. I would love to have one.
PS A good, but crowded boating area would be Barton cove usptream. Plenty of room for boats, and there should be some walleyes there too.