Go early to avoid the crowds (before 9 is ideal, before 7:30 and you can watch the sun rise). Trek to the top is worth it - not many people do it, so you can have long stretches all to yourself.
A must see! Hike partway up the mountain to experience the gates without the throngs of tourists. If you want to do the whole loop, allocate a good 1h30 since its ~4km up the mountain and back
If you want to avoid the throngs of tourists who are trying to get their Instagram shot go at 8:30am or earlier. It thins out as you go up though, which you should! It's super beautiful!
This place is magic. Go early to avoid the crowds (before 0800) and you'll be rewarded with great pictures and a much more spiritual experience. Hike all the way to the top! Great views of the city.
Fushimi Inari is famous for its hundreds of orange torii gates leading up to a shrine, but they also have an amazing bamboo forest as well. A must see if you come here.