I leave in two weeks for Yellowstone and am printing out a booklet based on information I've found. Before I just deleted it, thought I share it in case it's of use to anyone!
Before leaving Bozeman get bear spray, snacks, etc.
Expect 1-3 hours of driving a day
Fill up gas in outside of Yellowstone or get it in Jackson - cheaper
2 nights in Canyon/ 2 nights OF or West Yellowstone (do not stay at Grant Village)
Sunrise/sunset times (very cool): http://www.sunrisesunset.com/
Picknicking services in the park: www.nps.gov/yell/planyourvisit/picnic.htm
Get cooler for drinks/snacks
National Park info: http://www.nps.gov/yell/index.htm
Visit West Yellowstone Visitor Center for info
Last week in Sep is prime for fall foliage in Tetons and elk run in Yellowstone
Elk run - watch for bulls, they can decide to charge for no reason
Grand Teton boat ride to Jenny Lake (best photos of Grand Teton in morning)
Jackson - good lodging and food
Firehole Drive is cool (a right turn just north of Fountain Paint Pots)
Some say can see Grand Teton/Jenny Lake and Old Faithful in same day
Makes for a long day to do Lamar Valley and drive back to West Yellowstone
West Yellowstone to Lamar Valley via dunraven Pass (long day)
One day - Geothermal areas around OF
One day - Canyon with walks and views and maybe Hayden Valley, mudpots and Lake
One day - Northern loop of Lamary Valley, Mammoth area (minerva terrace) and Norris geyser basin
One day - hiking (Mt. Washburn and Fairy Falls)
One day - Grand Tetons (Oxbow Bend is must)
Do Upper Geyser Basin in morning at beginning of trip in case you want to visit again.
Only have predictions for 6 geysers, others you just get lucky.
Do Artist Paint Pots the afternoon from Mammoth to Old Faithful
Lamar Valley at dusk ~ more animals, wolves (from roadside)
Another trip looked like this:
Day 1 - Grand Teton, Old Faithful, Midway Geyeser Basin, Fountain Paint Pots, stay W. Yellowstone
Day 2 - W. Yellowstone to Norris, Grand Canyon of Yellowstone, Hayden Valley, Sulfur Cauldrons and lake Yellowstone, return to Canyon Village to stay
Day 3 - Canyon to Tower-Roosevelt and Lamar Valley. Evening in Lamar for wildlife. Stay at Roosevelt Cabins
Day 4 - Morning wildlife in Lamar, Mammoth, then hiking and such.