Hiya Clabby,
Are you confusing a tippet with the leader as a whole? A tippet of a couple of feet is alright on a leader of 9 or more feet. I use a leader of 9 to 16 ft or rarely even more, depending upon the size and speed/turbulence of the river I am fishing.
If the water depth is 5ft you will want a leader of about 15ft, maybe tied with flourocarbon to help get your weighted nymphs down to the right depth (assuming you want to be close to the bottom). You'll never get a vertical drop to the fly, especially as the water in the top of the middle of the river is faster flowing than the water at the bottom and edges. Try fishing the duo sometime and watch how the nypmh will trail quite high in the water behind the damp/dry fly it is suspended from so that a 3ft drop will give you a fishing depth of around a foot.
And the Gray Wolff is well covered via Google - look
here, for example. An Adams would do nicely as well as a general dry search pattern, it looks very similair to the Wolff. or a nice wee black number or griffiths Gnat.
Good luck with it,
Andy