Cave tubing tip amount

[songerling]

My family of 7 is doing cave tubing and zipline next week. What is a normal tip for something like that? I hate tips because I never know how much to give and I don't want to feel like a cheapskate. Any suggestions?

Edited May 27, 2016 by songerling

[PhillyTravelBug]

I am doing this on our cruise too, and have been wondering what an appropriate tip is for the guide,

[crewsweeper]

We usually tip around $10 per person to the head guide to distribute. But there's only 2-4 of us. For 7 you may wish to simply do 10-20% of the total cost, like at a restaurant. So if everyone in your party has a great time and the guides take really good care of you and have good tubes, go with ~20%. If it's "meh" and look like other parties were having better experiences and guides were indifferent to needs, tip less.