A 4 wheel drive (4WD) is always a better option than front WD in case there happens to be a snowfall more than 6 inches deep. God knows how much snow you may encounter in the 1st week of October. Due to inclement weather, you may encounter snow storm and about 5 to 6 inches snow on the road. In case snow starts to drizzle during your tour, it will be fine with your single wheel drive vehicle. Wish you good luck.......Professor

If you wish to visit Hayden Valley its better to go early..if you go early you can see more bison and other animals. Sun rise will be perfect time . beautiful place. We also visited the Lamar Valley its in the North entrance . Good Luck

I would imagine that the best viewing times are early morning and dusk when their prey is also active. Keep in mind that September, being later in the season, is possibly when bears are getting ready for hibernation. Something I learned from a ranger while we were there is that in both Hayden and Lamar Valleys, there are people who are employed by the park to spot very specific wildlife. You'll know who they are by their chairs and their lenses. If you see them trained in on something, then there is probably something of note they're seeing.

It took me many months to plan my trip. The Moon guide to Yellowstone was also quite helpful. I saw most of the park--check out my other reviews and let me know if I missed any you would like me to post. If you found my reply helpful, you can always give it a helpful vote :)

We did not encounter any glider cruising over the Yellowstone National Park. And I doubt if there is any such facilities over there, for it is a national park where most of the wildlife including exotic species like black bear, grizzlies, gray wolf reign in the wide open and anybody flying overhead in glider or operating a camera-fitted drone will certainly disturb the wildlife and also jeopardize the safety of the gliding personnel. But we found monoplanes flying over the Yellow Stone Lake. This gives tourists a grand vistas to photograph the magnificent park from high up.

There are large pullouts. Would bring binoculars or spotting scopes. Cameras with telephoto lens.

Approximately Sunrise to 7:30 AM to see animals. Dusk is a good time too.