Two of the three major guidebooks to the Wind Rivers are both well over 15 years old and the third dates mostly from the 1970's.
Ray Adkison's Hiking Wyoming's Wind River Range describes most (but not all) of the trails. He omits several in the Popo Agie (pronounced poh-POH-zhuh) Wilderness that I know about. Each description includes a mileage log and elevation chart.
Joe Kelsey's Climbing and Hiking the Wind River Mountains has brief descriptions of trails but better diagrams of the trails than does Adkison. He also describes very briefly some off-trail routes. His main focus is on climbing, but you will find some Class 2 (scramble) routes if that's where your interest lies. It has more about the area's history and geology than the Adkison book.
Finis Mitchell is a Wind Rivers pioneer who came to the area as a child in the early 1900's and spend most of his life there. His book, Wind River Trails, is far more of a fun read than a guidebook. Info is mostly from the 1970's although there are a few updates in the 1999 edition. It's now out of print and used paperbacks are going for a rather high price, per Amazon.
My friend Nancy Palliser is about to publish an off-trail guide to the Winds. Please note that her guide is designed primarily for advanced hikers with some climbing and glacier travel skills, although it will also include easier routes. I'll try to post about it when it's ready.
Douglas Lorain has written a guide, Backpacking Wyoming, due to be released June 1. I have no details, but it will undoubtedly include a number of trips in the Winds. I have several his books on Washington and Oregon which are excellent.
One thing you should know is that the lodgepole pine bark beetle has wiped out most of the low elevation forests in the region. The big scenery is up around and above timberline, and it's still there in its full glory, miles and miles of it! But the lodgepole forests at the lower elevations (which you transit on the way to the good stuff) are a bit bleak. That's the problem with the Green River Lakes approach, otherwise a great way to acclimatize.
The Earthwalk Press maps are good for planning but quite useless for anything off-trail or even identifying peaks and other features. I found them quite frustrating when I was actually out there. You should get them for planning purposes, though, especially since the USFS is no longer issuing their wilderness maps (which are better, IMHO). For when you're out there, download and print out the appropriate portions of the USGS maps.
Some googling will get you some excellent on-line trip reports.