Our noodles are 5-6 foot deep. On Larto, we baited them with shiners for crappie, and caught a mess of them, we also caught a lot of catfish there too. We also noodled on Buhlow lake and the Red river with good results.
I want to fish about 8 foot on the river though, so Im making some 2 foot extensions for my noodles. Im gonna use normal trotline string thats already on the noodles and Im gonna cut it into 2 foot extensions, with a medium sized swivel at each end of the extension. This way, all I have to do is clip my extension to my existing line on my noodles and attach a hook to the other end of the extension via the swivel at that end.
Hmm, that sounds complicated, but basically swivels are my friend.