One of the fun things I do when traveling internationally is that when i receive superior service I will give the person who led or aided me a little souvenir token from where I am from. They are usually inexpensive & people seem to really like them. For ex a small calendar, key chain, tea towel, stuff like that. Nothing fancy.
Personally I find that younger kids (kids to me, I'm almost 50 so I'm talking about "kids" who are my own kids age) really appreciate them as they make little more than minimum wage.
This is either in addition to the tip, or in place of a tip , depending on the situation.
Have fun! Sounds like a blast! I would like to suggest you journal the experience. IDK, it just helps me to appreciate the trip more & it's fun to go back later & read the journal