Best Booking platform for independent tour guides?

For any independent guides out there - I’m looking for the pros and cons of different booking platforms. It’s only me as a guide, and I only offer a few different tours at three time slots per day, so my scheduling needs aren’t very complicated. I get a lot of sales through Viator, and other similar platforms and some through my own website. Currently using FareHarbor, which is fine. They charge a 6% cc processing fee for my direct website sales (which feels very high to me) plus a small fee for sales through Viator et al. I like that they keep my schedule organized. They do a lot that I don’t need, and their interface is not intuitive, customer service is okay.
Curious what others with similar business models are using