It was on my way home from a six-hour hike and a three-hour bus ride -- between the hike and bus, my friends and I had waited for several trail-missing club members for 1.5 hours, so it was much later than usual. It was on my way home from a six-hour hike and a three-hour bus ride -- between the hike and bus, my friends and I had waited for several trail-missing club members for 1.5 hours, so it was much later than usual.

It was on my way home from a six-hour hike and a three-hour bus -- bride. Between the hike and bus ride, my friends and I had waited for several trail-missing club members for 1.5 hours, so it was much later than usual. It was on my way home from a six-hour hike and a three-hour bus ride. Between the hike and bus ride, my friends and I waited for several trail-missing club members for 1.5 hours, so it was much later than usual.

Just a few minutes after I said goodbye to my friend, I noticed a group of foreigners gatheringed around a phone, and they seemed to be having some trouble, so I came up to offer help. Just a few minutes after I said goodbye to my friend, I noticed a group of foreigners gathered around a phone, and they seemed to be having some trouble, so I came up to offer help.

This is a subtle change, but “gathering” implies that they were moving, as if one of them was holding out the phone and the others were moving towards it. “Gathered” implies they were already bunched together.

Just a few minutes after I said goodbye to my friend, I noticed a group of foreigners gathering around a phone, and they seemed to be having some trouble, so I came upwent over to offer help. Just a few minutes after I said goodbye to my friend, I noticed a group of foreigners gathering around a phone, and they seemed to be having some trouble, so I went over to offer help.

I led them to a restaurant nearby,(,) where I had ordered delivery several times. I led them to a restaurant nearby(,) where I had ordered delivery several times.

Without “had,” at first I thought you meant you ordered for them.

I led them to a restaurant nearby, where I had ordered delivery several times. I led them to a restaurant nearby, where I had ordered delivery several times.

Added "had" to make it clearer. Without "had" it sounds like you ordered delivery several times in that moment.

I was so tired that I couldn'an’t remember their hometown or other things they told me, but I'm happy that I was able to help. I was so tired that I can’t remember their hometown or other things they told me, but I'm happy that I was able to help.