You guys seem to have your planning system dialed, not shocking given your cumulative experience and analytical thinking. Surprised to not see a reference to a Microsoft Excel file, though, in order to help plan the route, logistics, schedule, etc. By far, NG TOPO! and Excel are the two most important programs I use when planning a long trip. Google Maps/Earth is probably third -- the landsat images are critical in determining vegetation and in updating the USGS maps if the landscape has changed since the maps were made (often the case in AK, where some of the USGS maps haven't been updated since they were first published in the 50's and 60's, and where glaciers have been receding, flood plains have changed course, and beaches have eroded).
I'm also going to offer a shameless plug here. A good chunk of Don and Alan's route appears to be part of the Sierra High Route. For those interested in this route, I'd recommend you start by picking up Roper's guidebook. I've posted a lot of additional info about the route and my SHR hike on my website, and I also developed a complete mapset using TOPO!.