Beartooth Publishing's Wind River Range is a good start for planning. At 1:100,000 and 100' contours, it's primarily a "trails map", showing "most but not all lakes", which can be confounding if relied upon for staying found. It's biggest virtue is the mileages between major junctions. With these you can plan reasonable days, as well as help with hour-by-hour location while hiking, and last, provide you with good enough information to plan an alternate route if things don't work out.
Adding to the "on the ground" confusion are the pack horse trails to high camps. They start on the main trails, but then often drift off at a drainage or across a meadow. Their trail looks like the real deal. The "real" trail, though is just a shadow veering off into the grass. So keep track of "last known point", time, and distance to the "next known point", and be prepared to poke around a bit when things aren't right. Parts of the Highline Trail come to mind.
For cross country routes I have relied on 7.5° quads, which are downloadable from a number of sites for free, that I crop/cut/paste, along with various aerial perspectives of the saddles and passes from Google Earth. Also search, within Google Earth, Google Images, and on Photobucket, for hiker photographs of the pass in question. Often times you'll find the perfect reference shot for your route.
Last, look through sites like TribleOutdoors and search for folks who have done your route. On many occasions I have found trip reports, including GPS waypoints, that have provided excellent confirmation of my intentions. (That is to say, we were equally crazy.)
Have fun. It's a great place.