I've been looking at the route in this book: High Alaska: A Historical Guide to Denali Mount Foraker and Mount Hunter, by Jonathan Waterman
There are some really good pictures by the inimitable Bradford Washburn, with little lines on them (mostly correctly labeled) where the historical routes passed.
Our anticipated route has the following elevations:
Plane Lands: 7,200'
Glacier Low Point: 6,700'
Kahiltna Pass: 10,000'
Peters Glacier, foot of Northwest Buttress: 7,800'
North Summit: 19,500'
Camp between summits: 18,500'
South Summit: 20,320'
Plane Pickup: 7,200'
The ridgeline should involve a couple thousand feet of up and down as we ascend the various peaks and spires along it, so we'll probably have to ascend over 15,000' from our plane dropoff.