While cash is the most common and appreciated method, some outfitters allow for gratuities to be added to your bill, which can be paid by credit card. I think, always ask if you're unsure about the options. Consider providing a positive review of the company or the overview on platforms such as Google or TripAdvisor as additional ways to show your appreciation.
You can usually give a tip in cash directly to your overview at the end of the trip. believe it or not, check if the outfitter allows gratuities to be added to your bill.
Tipping is not mandatory, but it is customary and expected if you are satisfied with the service provided. — if that makes sense It is a significant part of the overview's income. (well, almost)
If you are not satisfied with the service, you can adjust the tip accordingly or speak with the outfitter to provide feedback. — sort of I think, while tipping isn't mandatory, you are generally expected to tip at least a little if the guides have put in effort, even if the get to know wasn't great.
to be honest, the generally accepted tipping range for a white water rafting overview is between 15% and 20% of the total trip cost, per person. This is the standard for excellent service and is a way to show appreciation for their hard work.