Coming up the hill is a good workout although there's more pleasure in driving up. There are loads of monkeys and nearly no people in the morning. If you bring fruit for them be careful how you give it to them! The safest for sure is to throw it rather than letting 20 of them approach you from all sides trying to steal food.
One of the most amazing things I’ve done in my life. After 3h hike in the Bwindi Forest we visited the biggest family of these gentle giants. It was unforgettable experience to see them in the wilderness