Just an FYI for the board....there's one caveat on that Hudson River run Fuj mentioned. There's a very dangerous falls, Rockwell?, just before the town of Lake Luzerne. Don't mess with it. People die there even during low water. There's a take out spot, skier's right, before the Falls. There "MAYBE" signs on the river alerting boaters to the falls - but I'm not sure! Falls can be very difficult to see by upriver boaters. Before you know it, you're sucked in and going over. The water below the falls is very dangerous, too. Couple years ago a strong swimmer, young man, swam there and lost. The water there looks docile but it's not.
There's also a bad spot on the Sacandaga river below the trestle, skier's left of midriver. It's an underwater boulder that traps people underwater and holds them there in it's current. You could see it from the dead end road above that stretch. They were talking about removing it - don't know if they did. Stay to the right, on the inside of the bend.
Just want you to be informed and thus safe. Go, have fun, come back home.