I just booked Capt. marvins last night (second time). I've also read about potential probelms with Native way, but they, like capt. marvins, took care of the customers even though there were problems. As I recall, native way cancelled these pax tour because "there weren't enough people signed up" and arranged for their booking to be transfered to another operator.
Capt. marvins doesn't pick up at the tender docks, and customers walk two blocks away to a storefront office where they pay and then board the van for the trip to the boat. Personally, I like this better than being picked up at the dock because it gets terribly crowded there, and I don't do well in crowds... LOL.
Good luck on checking out Native Way... but there's no reason to be worried about Capt. Marvins.
paul